Geometry Warm UpsWeek 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 ?

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.

Monday #2

•What is the measure of ?

A linear pair adds to 180 so the missing angle is 70 degrees.

Monday #3

•What is the measure of ?

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.

Tuesday #1

•What is the longest side of ΔABC?

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.

Tuesday #2

•What is the longest side of ΔABC?

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.

Tuesday #3

•What is the longest side of ΔWXZ?

Find all of the missing angles first, then you can figure out the longest side. You should get segment WX.

Wednesday/Thursday #1

•What is the measure of ?

Wednesday/Thursday #2

•Find the measures of the exterior angles of ΔABC.

Wednesday/Thursday #3

•Find all the exterior angles of this triangle.

Wednesday/Thursday #4

•What is the measure of ?

Wednesday/Thursday #5

•What is the measure of ?

Friday – Quiz #1

•What is the measure of ?

𝑚∠𝑁𝐿𝑃=39 °

Friday – Quiz #2

•What is the longest side of ΔABC?

Friday – Quiz #3

•Find all the exterior angles of this triangle.

Friday – Quiz #4

•What is the measure of ?