GEOM A, U4L5: Lines and Triangles Practice

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Find m<1.

A. 30

The ratio of the angles measures of the acute angles in a right triangle is 1:2. What are the measures of these angles?

A. 30 and 60

What theorems or postulates allow you to find the value of y?

A. Vertical Angles Theorem and Triangle Angle-Sum Theorem

What is the measure of each angle in an equilateral triangle?

B. 60

Find the value of each variable.

B. x = 80, y = 80.

Which theorems or postulates could you use to find m<1 in the previous question?

C, D. Triangle Angle-Sum Theorem; Triangle Exterior Angle Theorem

The measure of one angle of a triangle is 40. The measures of the other two angles are in a ration of 3:4. What are the measures of these two angles?

C. 60 and 80.

Find m<1.

C. 90

Find the value of x.

C. x = 37

Find m<1.

D. 123


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