Given: ΔABC, AB = 7, BC= 8, AC = 9 Find: m∠A, m∠B, m∠C

Part 1)

Part 2)

Part 3)

Step-by-step explanation:

step 1

Find the measure of angle A

we know that

Applying the law of cosines

substitute the given values

using calculator

step 2

Find the measure of angle B

we know that

Applying the law of cosines

substitute the given values

using calculator

step 3

Find the measure of angle C

Remember that the sum of the interior angles in any triangle must be equal to 180 degrees

so

substitute the given values

£56

step-by-step explanation:

u divide 24 by 3 and u get 8 so if u do 8 time 7 or 8+8+8+8+8+8+8 u get 56 and 56 divided by 7 is 8.