Question

DE is tangent to Circle C at point D.

What is the measure of Enter your answer in the box.

Answer 1

39°

Explanation:

A radius of a circle (segment CD) drawn to the point of tangency (D) intersects the tangent (line DE) at a 90-deg angle.

That makes m<D = 90.

m<D + m<C + m<E = 180

90 + 51 + m<E = 180

m<E = 39