An isosceles triangle has congruent sides of 20cm. the base is 10cm. find the height of the triangle.

Step-by-step explanation:

Look at the picture.

The formula of an area of a triangle:

b - base

h - height

We need a length of a height.

Use the Pythagorean theorem:

We have:

Substitute:

            subtract 25 from both sides

Calculate the area:

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076