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Since, the sides of the triangle are in ratio 3:4:5, the given triangle is a right-angled triangle. Let the three sides of the triangle be '3x' cm, '4x' cm and '5x' cm, respectively So, area of the triangle = (1/2) X (3x) X 4x = 216 Or, 6x2 = 216 Or, x2 = 36 So, x = ±6 Since, length of side cannot be negative, x = 6 So, required perimeter = 6 X (3 + 4 + 5) = 72 cm Hence, option a.
ABC is a triangle. AB = 5 cm, AC = √41 cm and BC = 8 cm. AD is perpendicular to BC. What is the area (in cm2) of triangle ABD?
If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 78 cm² , then the area of ∆EFG is?
The area of the largest triangle inscribed in a semi-circle of radius R is-
ABC is a right angled triangle. ∠ BAC = 90o and ∠ ACB = 60o. What is the ratio of the circum radius of the triangle to the s...
In ΔABC, PQ is parallel to BC If AP: PB= 2:5 and AQ= 2 cm, AC is equal to?
AB and CD are parallel tangents to a circle with center O. Points P and Q are on AB and CD, respectively, such that PQ touches the circle at R. Find the...
If G is the centroid and AD, BE, CF are three medians of ∆ABCwith area 24 cm 2 , then the area of ∆CGD is?
In a triangle ABC, AB = 13 cm, BC = 14 cm, and AC = 15 cm. Find the area of the triangle and the length of the altitude from vertex A to side BC.
