Measure Angles of Circles Using Degrees

T.I.P.S.

Students must be able show angle measures as a fractional part of a circle, with a denominator of 360, as long as the vertex of the angle is the center of the circle.

Example

The diagram below illustrates a right angle drawn from the center of the circle. Write a fraction in which the denominator is 360 and the numerator is the measure of the angle. Then, draw and label a similar picture for a straight angle. 

  Hint  Possible Solution 

TEKS

4.7 Geometry and measurement. The student applies mathematical process standards to solve problems involving angles less than or equal to 180 degrees. The student is expected to: (B) illustrate degrees as the units used to measure an angle, where 1/360 of any circle is one degree and an angle that "cuts" n/360 out of any circle whose center is at the angle's vertex has a measure of n degrees. Angle measures are limited to whole numbers.

Feedback

Click here to submit feedback.