Perimeter and area of a triangle

Given a triangle with the following measurements, answer these questions:

Basis=$11$ cm, side 1 $= 11$ cm, side 2 $=7,5$ cm, height (h) $=7$ cm

  1. Area
  2. Perimeter
  3. Semiperimeter

$A=\dfrac{b \cdot h}{2}$, where $b$ is the basis and $h$ the height. Applying the formula we get: $$A=\dfrac{11 \cdot 7}{2}=38,5 \ \mbox{cm}^2$$

The perimeter is the sum of all the sides of the triangle.

$P=a+b+c=11+11+7,5=29,5$cm

The information of the statement interpreted by our formula is:

$$a=11, b=11, c=7,5$$

Then we have: $p=\dfrac{a+b+c}{2}=\dfrac{11+11+7,5}{2}=14,75$

  1. $38,5 \ \mbox{cm}^2$
  2. $29,5$ cm
  3. $14,75$ cm
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