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noun
1The continuous line forming the boundary of a closed geometric figure.
‘the perimeter of a rectangle’- ‘Finally, if the rope is short enough (less than half the perimeter of the barn), the problem simplifies immensely.’
- ‘The number four, for example, would be the ratio of the perimeter of a square to one of its sides and also the ratio of the area of a square to the area of a square whose side is half the original.’
- ‘The perimeter of the inner polygon is shorter than the circumference of the circle, while that of the outer polygon is longer.’
- ‘You calculate the perimeter by multiplying the diameter by pi.’
- ‘He compares the areas of figures with equal perimeters and volumes of solids with equal surface areas, proving a result due to Zenodorus that the sphere has greater volume than any regular solid with equal surface area.’
- ‘Then these rings also have the additional property that both the inner perimeters are equal and the outer perimeters are equal.’
- ‘We found that the area, perimeter, length, and width of the lamina were highly correlated, suggesting the existence of a common genetic control.’
- ‘It is easier to find a pentagon that circumscribes the same circle as the given square and has the same perimeter.’
- ‘Zenodorus studied the area of a figure with a fixed perimeter and the volume of a solid figure with fixed surface.’
- ‘Answer: the arc lengths and, therefore, the perimeters are equal.’
- ‘The most interesting results show, with a very ingenious proof, that an equilateral triangle has a greater area than any isosceles or scalene triangle with the same perimeter.’
- ‘The square and the cube are abstract, they're mathematical forms, measurements, perimeters, boundaries, mental constructs, and as such, are emotionally unknowable.’
circumference, outside, outer edgeView synonyms- 1.1 The outermost parts or boundary of an area or object.‘the perimeter of the garden’figurative ‘my presence on the perimeter of his life’
- ‘About 30 minutes after they had started out, they arrived just beyond the outer perimeter of the lab area.’
- ‘Sub-zero temperatures at the complex left the narrow perimeter roads covered in sheet ice, with virtually no grip for the opening cars.’
- ‘I drove around our perimeter road one rainy night and saw lots of little rodents of some type running around.’
- ‘Surrounding the entire perimeter of the fence was a long line of barbed wire, spiky and foreboding.’
- ‘One is a low-voltage electric fence around the perimeter of your garden.’
- ‘Most styles can be adapted to meet any pool codes in your area, and provide a safe perimeter fence around your pool.’
- ‘A tough protein envelope surrounds the inner perimeter of the cell.’
- ‘We could walk the entire perimeter of the island in less than an hour.’
- ‘A two-kilometre perimeter fence for the broader area is also planned.’
- ‘Signs are being placed around airport perimeters urging them to join the cause.’
- ‘He said it was the landlord of the estate who had replaced the perimeter fence around the whole of the industrial area.’
- ‘They ran to a perimeter concrete fence and jumped over.’
- ‘Burn some sage, and walk the inner perimeter of your room or home if you can.’
- ‘There were wooded areas beyond the perimeter and alongside one of the streams, but the course itself was mostly just a large empty field.’
- ‘The court heard how she made off with thousands of pounds worth of holidaymakers' property after scaling the perimeter fence and entering the rooms.’
- ‘The only sure way of deterring them is to have an electric fence built around the perimeter of the garden.’
- ‘For the less energetic, there is a walk around the perimeter racecourse road beginning at 2 pm.’
- ‘There are lots of grasshoppers around here, but my hens patrol the garden perimeter fence and really reduce the numbers of insects in the garden.’
- ‘After dark I drove the perimeter road and saw more jackals and foxes.’
- ‘Repeat this until the entire perimeter of the room has been sanded.’
boundary, border, frontier, limits, outer limits, bounds, confines, edge, margin, periphery, borderline, vergeView synonyms - 1.2 A defended boundary of a military position or base.
- ‘In their current formation, they were able to observe every inch of the camp perimeter.’
- ‘Our battalion promptly relieved the Marine battalion in place, freeing it to plan for its attack within the safety of the Army's perimeter.’
- ‘Ahead of us is a large cave entrance protected by a perimeter of military guards and equipment.’
- ‘Simultaneously, they would seize territory throughout the Pacific Rim and attempt to establish a strategic defensive perimeter.’
- ‘She didn't patrol the base perimeter to repel insurgents.’
- ‘Stationary truckloads of sand parked at the mouth of every street bear an eerie resemblance to a military perimeter.’
- ‘One of the challenges of such a collective training event is finding a location to set up a support base camp that allows live fire from within the perimeter.’
- ‘He immediately set up a defensive perimeter and fortified his area.’
- ‘Our job was to scout, observe and report on enemy activity in the vast area beyond our perimeter.’
- ‘The idea of trained guards patrolling a secure perimeter is a good one.’
- ‘The Kiwis do security patrols around the base perimeter and man the watchtower on a roster system.’
- ‘If the enemy builds an outer defensive perimeter around the city, it has to be taken in two stages.’
- ‘The troops were tasked with planning the defense of the squadron and performing defensive operations around the base perimeter.’
- ‘However, e-mail content filters that look for viral patterns using anti-virus engines will help defend your network perimeter.’
- ‘Andrews and the crew quickly exited the aircraft and established a defensive perimeter.’
- ‘Military personnel will also have access from inside the camp perimeter.’
- ‘They were stationed around the perimeter of the base.’
- ‘Once, the primary goal was to protect network perimeters.’
- ‘Bitter fighting ensued and the enemy overran forward elements, infiltrated the perimeter and rendered friendly positions untenable.’
- ‘Beyond the defensive perimeters of many castles the vestiges of medieval market places can still be found, often with market crosses.’
- 1.3Basketball An area away from the basket, beyond the reach of the defensive team.‘he was very patient in working the ball around the perimeter’
- ‘The low post has two options as the ball moves around the perimeter.’
- ‘That is to say, whenever the ball is on the perimeter, 3 defensive players are between the player with the ball and basket.’
- ‘More than anything, the team needs his defense on the perimeter against more athletic swingmen.’
- ‘He's also beginning to get a feel for the right time to squeeze off a tough shot and when to flick the ball out to the perimeter and restart.’
- ‘With reduced defensive contact on the perimeter, point guards can do their jobs with less harassment.’
2An instrument for measuring the extent and characteristics of a person's field of vision.
Usage
See parameter
Origin
Late Middle English: via Latin from Greek perimetros, based on peri- around + metron measure.
Pronunciation
Further reading
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An A-Z of country name origins
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