defence exam Indian Navy Chargeman/Draughtsman Mock Test 2023 Quantitative Aptitude Mensuration Plane Figures
ABC is a triangle with sides AB = 41 cm, BC = 28 cm and CA = 15 cm. If D, E and F are the mid-points of AB, BC and CA respectively, then what is the area of the triangle DEF?
1
63 square cm
2
45 square cm
3
31.5 square cm
4
22.5 square cm