Practicing Success
The sides of a triangle are 24 cm, 26 cm and 10 cm.At each of its vertex, circles of radius 4.2 cm are drawn. What is the area (in $cm^2$) of the portion covered by the three sectors of the circle ? $(\pi = \frac{22}{7})$ |
92.28 120 105.86 27.72 |
27.72 |
We have a concept, The area made by three circles in three vertices of a triangle of the same radius will be half the area of the circle. We have, The sides of the triangle = 24 cm, 26 cm, and 10 cm. Area of the triangle = \(\frac{1}{2}\) × 24 × 10 = 120 cm2 The radius of the circle = 4.2 cm The total angle created in three circles in the vertices = 180° The area of the triangle which is inside the common portion of the triangle and circle = (1/2) π (4.2)2 = 27.72 cm2 |