Question

A. Given ΔABC with the exterior angle on each vertex as shown: Let the interior angles at A, B, C measure a, b, c respectively while the exterior angles measured d, e, f. Determine the following sum of angles: 1. a + d = 2. b + e = 3. c + f = 4. (a + d) + (b + e) + (c + f) = 5. (a + b + c) + (d + e + f) = 6. a + b + c = 7. d + e + f =

Answer 1

Answer:

answer is -1

Step-by-step explanation:

a+b+c = 7

also ,

(a+b+c)+(d+e+f) =6

therefore ,

7 +(d+e+f) = 6

d+e+f = 6-7

= -1