Pre-Algebra Examples

 $\begin{array}{r} b = & 13 \\ h = & 21.2 \end{array}$

Step 1

The area of a triangle is equal to $\frac{1}{2}$ the base times the height.

$\frac{1}{2} \cdot (b a s e) \cdot (h e i g h t)$

Step 2

Substitute the values of the base $b = 13$ and height $h = 21.2$ into the formula for the area of a triangle.

$\frac{1}{2} \cdot 13 \cdot 21.2$

Step 3

Combine $\frac{1}{2}$ and $13$ .

$\frac{13}{2} \cdot 21.2$

Step 4

Multiply $\frac{13}{2} \cdot 21.2$ .

Tap for more steps...

Step 4.1

Combine $\frac{13}{2}$ and $21.2$ .

$\frac{13 \cdot 21.2}{2}$

Step 4.2

Multiply $13$ by $21.2$ .

$\frac{275.6}{2}$

Step 5

Divide $275.6$ by $2$ .

$137.8$