Since we have a right angle triangle and we know two of its sides we can easily find out the thirds side (the value of d) by using the Pathagoras Theorem. In our case 7 and d are our legs and the hypotenuse is equal to 9, so...

(Based on the Pathagoras Theorem)

$c^{2} = a^{2} + b^{2}$

$9^{2} = 7^{2} + d^{2}$

$d^{2} = 9^{2} - 7^{2} \\d^{2} = 81 - 49\\d^{2} = 32\\d = \sqrt{32}\\$

d ≈ 5.7km

There for aproximate distance across the lake is equal to 5.7km

7 0

2 years ago

Read 2 more answers

Rita is hiking along a trail that is 15.8 miles long. So far she has hiked along one-tenth of the trail. How far has Rita hiked?

Phantasy [73]

The answer is 1.58 miles

8 0

3 years ago

Eileen brought 8 roses for $45.50.Which is the best way to estimate the cost of one rose?

masya89 [10]

Answer:

50 divided by 8 is the best estimation. gives you 6.25

7 0

2 years ago

Can 16, 19, and 34 form a triangle? Show your work.

I am Lyosha [343]

yes, since a+b > c for all sides

3 0

3 years ago