ok im still having trouble with this problem...i figured out that one side is sqrt(5), but then thats it. so the sides of the shades triangle are 1*k, 2*k and sqrt(5)*k.
im using k because it is saying its a ratio. so what i am asking is this, how can i use this info to find the area of the triangle abd?
Ok; to start, you do not need triangle BCF; disregard it.
Let a = BC; then AB = 2a (ratio 1:2) ; still with me?
Let AC = b
Using triangle ACE:
since sides = b, area = b^2 SQRT(3) / 4 ; since that area is given as 20:
b^2 SQRT(3) / 4 = 20
b = SQRT[80 / SQRT(3)] ; that'll give you b = ~6.796
Using right triangle ABC:
b^2 = a^2 + (2a)^2
a = SQRT(b^2 / 5) ; that'll give you a = ~4.298
Using triangle ABD:
since sides = 2a, area = a^2 SQRT(3) ; that'll give you area = 16.00000000....
Hope you followed...come back with questions if not.
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are equilateral triangles.
The area of
Find the area of
The ratio of the areas of two similar polygons
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The ratio of the sides of and is.
The ratio of their areas is.
We have: .