if the height of an equilateral traingle is 8 cm then calculate the area. please help me with this very urgent
Answers
Answered by
1
Answer:
see we need base here
Step-by-step explanation:
as we have 3 angles 60˚ 3 sides equal and both triangles are congruent
if u have found any side use this heron's formula
Answered by
8
Answer:
Hey mate here is your answer.....
Area
=
64
3
≈
21.3
c
m
2
Explanation:
Area of an equilateral triangle
=
1
2
b
h
, where:
b
= base
h
= height
We know/
h
=
8
c
m
, but we need to find the base.
For an equilateral triangle, we can find the value for half the base with Pythagoras.
Let's call each side
x
, half the base is
x
2
√
x
2
−
(
x
2
)
2
=
8
x
2
−
x
2
4
=
64
3
x
2
4
=
64
x
2
=
64
⋅
4
3
=
256
3
x
=
√
256
3
=
16
√
3
3
Area
=
1
2
b
h
=
1
2
x
(
x
2
)
=
x
2
4
=
√
256
3
2
4
=
256
3
4
=
256
12
=
64
3
≈
21.3
c
m
2
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