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Geometry Test 1 #17

Question for Martha:

Jacob’s Geometry Test 1 #17

Answer from Cassidy Cash:

This problem involved using the triangle theorem that says “All three angles of any triangle will add together to give 180” (this is a paraphrase of the Triangle Sum Theorem, page 66) The problem asks us to find <ABC, but <ABC is made up of “x” plus “x”. So we first have to find what “x” equals.

Jacob's Geometry Homeschool Math
Jacob’s Geometry Test 1 Problem 17

Even though there are two little triangles in that figure, they form a larger triangle, Triangle ABC Using the Triangle Sum Theorem, we know that 48 + x + x + 32 should equal 180 So we add that together 48 + 2x + 32 = 180 32+48 = 80 80 + 2x =180 2x = 180 -­‐80 2x = 100 x = 100/2 = 50 Therefore, since <ABC = x + x, and x = 50, <ABC = 50 + 50 = 100

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Geometry Test 1 Problem 11

Question from Amy:

Trouble seeing cube. Help?

Answer from Cassidy:

If you missed problem 11 (under Review Section 1), you can use this template to print out that diagram, and fold the cube at home. Then you can see with your own eyes (and hands!) how that cube comes together.

Print the Diagram for Jacob’s Geometry Test #1 Chapter 1 #11 here.

This will help with problems 9-12 as well.