A triangle has an area of 10.510.5 square feet. the base of the triangle is 66 feet. what is the height?

1 answer:

6 0

I'm confused... you can't have 2 decimals in a number.... anyway I'm going to help solve it as if the number was 10.5105
The formula for the area of a triangle is A = 1/2bh. So, if you were given the base and height and asked to find the area, you would multiply the base and height then divide by 2 (or multiply by 1/2, same thing). Here you have to do the opposite. Take the area, multiply it by 2, then divide it by the base.
10.5105(2) = 21.021
21.021/66 = 0.3185
h = 0.3185 ft

Hope this helped even if 0.3185 isn't the correct answer because 10.510.5 doesn't make sense lol.

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D.) is 13/5 it got cut off HELP NEEDED [10 points up!]

vodomira [7]

It would be A. You can find this out by using SOH CAH TOA,

SOH means sin= opposite/hypotenuse

CAH mean cos= adjacent/hypotenuse

TOA means tangent= opposite/adjacent

You would use CAH since you are trying to find cos∠C

You would have cos∠C=10/26.

26 is the hypotenuse since it is opposite the right angle and is the biggest side.

10 is the adjacent since it is right next to C

You would simplify this down to 5/13 by dividing by 2.