Geometry Warm Ups. Week of February 4-8. DFA Review. For the next two weeks, our Warm Ups will be focused on preparing you for the DFA. Please make sure you understand these concepts. There will be a quiz on Friday. Monday #1. What is the measure of ?.
Week of February 4-8
With an isosceles triangle, the base angles are congruent. The sum of the angles inside is 180, so this should be easy to figure out…the answer is 52.
A linear pair adds to 180 so the missing angle is 70 degrees.
Angle BDA is the same as A because the triangle is isosceles. Angle ABD will be 120 and that makes angle CBD 60 degrees. Angle C would also be 60 because that triangle is also isosceles (look at it upside down), so the angle the question asks for is also 60 degrees.
The missing angle is 63 degrees. The longest side of a triangle is opposite the largest angle so, the longest side here is segment AB.
The missing angle near B is 50 degrees, so angle A is now 63. Just like the last one, the longest side is opposite the largest angle inside the triangle so the answer is segment AB.
Find all of the missing angles first, then you can figure out the longest side. You should get segment WX.