Use the drawing provided to show that the area of the isosceles triangle is
To find:
To show that the area of the isosceles triangle is
Consider the following figure,
Let us put the name for the isosceles triangle ia ABC and altitude is
We know that
Assume that
General formula for cosine ratio and sin ratio is given below,
For
From the above figure shows that the s is the value of hypotenuse since it is opposite to right angle.
Then DC is the length of the leg opposite to
Therefore,
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