Unit 12: Circles

Question

Four tangents are drawn from E to two concentric circles. A, B, C and D are the points of tangency. Name as many pairs of congruent triangles as possible and tell how you can show each pair is congruent.

I need help with this, I need to name 4 pairs and say how are they congruent by using postulates or theorems.

1. This question comes with a picture which is the link below

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Answer 1

I'll help you with this, but I am not going to do the problem for you.

From a given point outside a circle any tangents drawn to a circle are congruent.

What segments are congruent?

Radius drawn to the pont of tangency forms a right angle and All right angles are congruent.

What angles are congruent?

All radii of a given circle are congruent. What segments are radii and therefore congruent?

This should help you get started, message me if you need further help.