I. Given an isoscele triangle ABC as shown with angles of 20, 80, and 80. Segments CK and BL are drawn as shown so as to divide the base angles 30/50 and 20/60.

What is the measure of angle KLB?

II. Given an isoscele triangle ABC as shown with angles of 20, 80, and 80. Length AM is the same as BC. What is the measure of angle ACM?

Solutions by Aarnout Brombacher(To compare with your solutions!!!)Challenge: Can you find the flaw in one of the solutions? Can you correct it?

Another solution for Problem 1. Don't look if you have not attempted the problem.

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