Question

1. calculate the area of the triangle.

20 mm
11 mm
\frac{1}{2}(20)(11)=

Explanation:

Step1: Recall area formula

The formula for the area of a triangle is $A=\frac{1}{2}bh$, where $b$ is the base and $h$ is the height.

Step2: Identify base and height

From the figure, the base $b = 11$ mm and the height $h=20$ mm.

Step3: Substitute values

Substitute $b = 11$ and $h = 20$ into the formula: $A=\frac{1}{2}(20)(11)$.

Step4: Calculate

First, $\frac{1}{2}\times20 = 10$, then $10\times11=110$ $mm^{2}$.

Answer:

$110$ $mm^{2}$