Question

Diagram I shows a triangle with a foot length of 4ycm and a height (y +5). Figure 2 shows a square with a length of y cm. Given the area of ​​the triangle exceeds the rectangle by 39cm ^ 2. Calculate the perimeter of the two diagrams.

P.s. Yes I am not from the United Kingdom but I sincerely need help with my homework please please help me

Answer 1

Area of ​​equilateral triangle:36cm

Square area:12cm

Explanation:

We need to find the corresponding relationship, it is not difficult to find that this is a simple quadratic function problem.

I used pictures to express the process. You can click to view. I'm not English either. I'm Chinese, but I believe that academics know no boundaries.