Question

What is the value of a + b? You may assume that the ray is tangent to the circle.

90

128

64

180

https://teccom8515-teccon-pps.gradpoint.com/Resource/10513144,0/Assets/testitemimages/geometry_b/circles/mc057-1.jpg

Answer 1

@mathstudent55 I'm stuck on this one too

Answer 2

I'm a bit confused about angle b - Is it the angle between the ray and the chord?

Answer 3

A radius of a circle and a tangent as shown above form a 90-deg angle.

Answer 4

yes

Answer 5

so does a+b= 90 or is there another angle between b and the tangent ray?

Answer 6

Correct.

Answer 7

This problem shows you way more stuff than you need to answer the question.

Answer 8

Thank you

Answer 9

By correct, I mean a + b = 90.

Answer 10

yw