1

Problem

Find the perimeter of an acute triangle ABC in which the sides are given as, AB = 7 units, BC = 8 units, and CA = 5 units.

2

Step

The given side AB is

7 units

3

Step

The given side BC is

8 units

4

Step

The given side CA is

5 units

5

Hint

Perimeter of a triangle is P = AB + BC + CA.

6

Step

Substitute the vlaues

P = 7 + 8 + 5

7

Step

After simplification

P = 20

8

Solution

So, the perimeter of the acute triangle is 20 units.

9

Sumup

Please summarize steps

Choices

10

Choice-A

This is not correct because it appears to be the sum of the three side lengths rather than the actual perimeter

Wrong 27 units

11

Choice-B

This is not correct because it appears to be the sum of the three side lengths rather than the actual perimeter

Wrong 25 units

12

Choice-C

This is not correct because it appears to be the sum of the three side lengths rather than the actual perimeter

Wrong 22 units

13

Choice-D

This is correct for the perimeter of the given acute triangle

Correct 20units

14

Answer

Option

D

15

Sumup

Please summarize choices