8M: Geo QC (triangle sum & exterior angles)
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1. Given the following diagram of ∆CDB. Find the value of x. x = A xo o B 52o C D 2. Given the following diagram of ∆CDB. Find the value of x. x = C xo o 60o D B 112o A 3. Given the following diagram of ∆CDB. Find the value of x. x = A 139o o B xo C D 4. Given the following diagram of ∆CDB. Find the measure of angle DCB. A m∡DCB = 110o C 58o D o B 52∘ 5. Two angles in a triangle measure 42 degrees and 57 degrees. What is the measure of the third angle? degrees 6. One acute angle in a right triangle measures 72.5 degrees. What is the measure of the other acute angle? degrees 7. What is the missing angle measure in the triangle below? 110∘ 34∘ 46 degrees 180 degrees 36 degrees 216 degrees 8. Find m∡T. m∡T = F 31∘ degrees ? T I 9. Two angles in a triangle measure 108 degrees and 16 degrees. What is the measure of the third angle? degrees 10. Given the following diagram of ∆CDB. Find the value of x. x = o C 74∘ 60o D B xo A 11. True or False A triangle can have two 90 degree angles. TRUE FALSE A 12. What is the value of x below? 20x∘ (71x-1)∘ 1 70 20 180  13. Find the value of a in the figure below.  14. What is the value of x in the figure below?  15. What is the measure of angle A? degrees |
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