What is the distance across the lake?

Given:

Height of right triangle = 9 mi

Hypotenuse = 17.5 mi

Base of right triangle = Distance across lake

To find:

The distance across the lake.

Solution:

Using Pythagoras theorem:

In right triangle, square of the hypotenuse is equal to the sum of the squares of the other two sides.

Subtract 81 from both sides.

Taking square root on both sides.

⇒ base = 15

The distance across the lake 15 mi.

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step-by-step explanation:

triangle abc is reflected on the line x=-6.5 then reflected again on the x axis

step-by-step explanation: