Erin wanted to know the height of another triangle. She knew the base was 20 ft., and the area was 60 sq. ft. Find the height.
can u tell me what formula to use and how to do it?? please????
2007-09-30 13:51:20 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The formula for calculating the area of a triangle is
Area=1/2*base*height
therefore,the height of the triangle can easily be found if the area and base is given ,by dividing the area by 1/2*base
Here Area=60 sq ft
Base=20 ft
therefore,the height of the triangle is
60/1/2*20
=60/10
=6 ft.
2007-09-30 14:00:56 · answer #1 · answered by alpha 7 · 0⤊ 0⤋
Formula for the area of a triangle:
1/2 x base x height = area
1/2 x 20 x ? = 60
10 x ? = 60
? = 60/10
? = 6
2007-09-30 20:56:57 · answer #2 · answered by language is a virus 6 · 0⤊ 0⤋
Area is one-half the base times the height, or 1/2 bh. So the base is 20, area is 60, and plug into formula.
1/2 times 20b = 60.
Solve from there.
2007-09-30 20:59:27 · answer #3 · answered by Howard H 7 · 0⤊ 0⤋
Given:
base of a triangle = 20 ft.
area of a triangle = 60 sq. ft.
Formula for the area of a triangle = base x height / 2
Let h be the height.
A = bh / 2
60 = 20h /2
Multiply both equations by 2:
120 = 20h
Divide both equations by 20
h = 6ft
2007-09-30 21:00:15 · answer #4 · answered by edith p 3 · 0⤊ 0⤋
Area of a triangle formula:
A = 1/2 b*h
For yours:
60ft^2 = 1/2 * 20 ft * h
Factoring it all out, you get"
h = 2 * (60 ft^2 / 20 ft)
h = 6 ft.
2007-09-30 20:58:15 · answer #5 · answered by skeptik 7 · 0⤊ 0⤋
Area of Triangle = 1/2 * (base) * (height)
1/2 (20) (height) = 60
10 (height) = 60
height = 6
2007-09-30 20:54:14 · answer #6 · answered by MathDude356 3 · 1⤊ 0⤋
umm dont quote me on this but i am pretty sure u do leanth times width then u divide that by 2
2007-09-30 21:00:01 · answer #7 · answered by cheergirl 2 · 0⤊ 0⤋