Question

1. Three sticks of lengths 10cm, 5cm and 3 cm. A triangle is formed using the sticks, then its semi perimeter
is
b. 8cm
c. 9cm
d. 10cm
a 7 cm
​

Answer 1

$\large \red{a} \green{n} \purple{s} \blue{w} \pink{e} \purple{r}$

Step-by-step explanation:

This is also true for any type of triangle. The proof lies in using the midpoint theorem/similarity of triangles. (You can post a separate question about the proof and I would be glad to answer it).

In this question, the area of the triangle = (1/2) x product of perpendicular sides = (1/2) x 3 x 4 = 6 sq cm.

Thus, area of the required triangle = (1/4) x 6 = 1.5 sq cm.