Solve for all the missing angles for triangle ABC: a= 10cm, b=15cm, c= 20cm. State the angles in order (Angle A, B,C) and round answers to the nearest hundredth

Part 1)

Part 2)

Part 3)

Step-by-step explanation:

step 1

Find the measure of angle A

Applying the law of cosines

we have

substitute

Solve for A

using a calculator

step 2

Find the measure of angle B

Applying the law of cosines

we have

substitute

Solve for A

using a calculator

step 3

Find the measure of angle C

we know that

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

so

we have

substitute

c. 4 and 1/2 pounds is the answer! : )

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19