30 60 90 Triangle Questions
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What Is a 90-Degree Turn?
A 90-degree turn is one-quarter of turn regardless of direction. If a person imagines himself standing looking straight ahead and and then turning to face the right side or the left side, he has made a 90-degree plough.
A circumvolve contains 360 degrees. If a person imagines himself standing in the middle of a clock and facing the 12 o'clock position and and so turning to the correct to face the 3 o'clock position or to the left to face the nine o'clock position, he has made a 90-degree turn, which is i-quarter of a complete circle. If he again faces the 12 o'clock position and turns either to the correct or to the left to confront the 6 o'clock position, he has made a 180 degree turn, which is half of a complete circle. If he returns to the 12 o'clock position and turns to the correct to face the 9 o'clock position or to the left to face the three o'clock position, he has turned 270 degrees, which is three-quarters of a complete circumvolve. If he faces the 12 o'clock position and turns all the way to the correct or left to return to the 12 o'clock position, he has turned 360 degrees, which means he has made a complete circle.
30 60 90 Triangle Questions,
Source: https://www.reference.com/world-view/90-degree-turn-4c5ef15896b904ef?utm_content=params%3Ao%3D740005%26ad%3DdirN%26qo%3DserpIndex&ueid=fa06716b-614c-44bd-851d-86dd76145296
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