Question

Someone pleeeeease help me

Answer 1

Answer:

22.4cm

Step-by-step explanation:

The formula for the diagonal is:

$d = \sqrt{l^{2} + b^{2} +h {}^{2} }$

Where:

l is the length (AB, CD)

b is the width (BC, AD)

h is the height (AE, BF, CG, DH)

We know d, l, b and we can calculate h

$25 = \sqrt{10^{2} + 8^{2} + h^{2} }$

We evaluate both sides to ² to remove the square root:

$25^{2} = 100 + 64 + h {}^{2}$

$625 = 164 + h {}^{2}$

To find the value of h we have to do the square root, as it is to the ²:

$\sqrt{625 - 124} = h$

$\sqrt{501} = h = 22.4cm$