Given the right triangle ABC with right angle B, angle A is twice the size of angle C. If the measure of side AB is 7 units, what is the measure of side AC?

AC= 14 units

Step-by-step explanation:

Given

--- right-angled

Required

Find AC

The question is illustrated using the attached triangle

The angles in a triangle are:

Substitute and

Collect like terms

To find AC, we make use of the sine of angle C:

--- i.e. opposite/hypotenuse

So:

Make AC the subject

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral