Question

Let A be the area of a triangle with sides of length 25,35 and 30.Let B be the area of a triangle with sides of length 25,25, and 40.Find A/BDraw diagrams to represent the two triangles and label them with their dimensions. Use the formula for the area of a triangle to find A and B. Use PYTHAGOREAN Theorem

Answer 1

Answer:

$\frac{A}{B}=1$

Explanation:

Given that the triangle with area A has side length 25,25,30

And Triangle with Area B has side length 25,25,40.

Let us sketch the triangle below;

From the image of A and B;

The height of A is a, and that of B is b;

Recall that the area of a triangle can be calculated using the formula;

$\text{Area=}\frac{1}{2}bh$

where b is base length and h is height.

Using Pythagorean theorem, let us calculate length of the heights a and b;

$\begin{gathered} c^2=a^2+b^2^{} \\ b^2=c^2-a^2 \\ b=\sqrt[]{c^2-a^2} \end{gathered}$

substituting for each triangle;

$\begin{gathered} a=\sqrt[]{25^2-15^2} \\ a=\sqrt[]{400} \\ a=20 \end{gathered}$$\begin{gathered} b=\sqrt[]{25^2-20^2} \\ b=\sqrt[]{225} \\ b=15 \end{gathered}$

So, the area A and B will be;

$\begin{gathered} A=\frac{1}{2}bh \\ A=\frac{1}{2}\times30\times20 \\ A=300\text{ square units} \end{gathered}$$\begin{gathered} B=\frac{1}{2}\times40\times15 \\ B=300\text{ square units} \end{gathered}$

the ratio A/B is;

$\frac{A}{B}=\frac{300}{300}=1$

Therefore;

$\frac{A}{B}=1$