2 years ago

What is the perimeter,in centimeters of triangle QRS?

Mathematics

1 answer:

Oxana [17]2 years ago

6 0

Answer: 60

Step-by-step explanation:

You have to use Pythagorean Theorem because the other side is not listed of the triangle

Pythagorean Theorem: a² + b² = c²

a² + 20² = 25²

a² + 400 = 625

625-400 = a²

a² = 225

Find the square root of 225 to find the missing length

$\sqrt{225}$ = 15 (this is the missing length for QS

To find the perimeter, add all the sides...

15 + 20 +25 = 60

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