In ΔPQR, PQ = 4 cm, QR = 3 cm, and RP = 3.5 cm. ΔDEF is similar to ΔPQR. If EF = 9 cm, what is the perimeter of ΔDEF?
The altitude of an equilateral triangle is 6√3 cm. Find the area of the equilateral triangle.
Two sides of a triangle are 10 cm and 15 cm. Which of the following can be the third side of the triangle?
Find the area of a trapezium whose parallel sides are 12 cm and 18 cm and the distance between them is 9 cm.
The area of a triangle is 480 cm² and the ratio of its sides is 10: 24: 26. What is the perimeter of the triangle?
If each side of an equilateral triangle is 12 cm, then its altitude is equal to:
In a triangle, the lengths of two sides are 13 cm and 14 cm, and the included angle between them is 60°. Find the area of the triangle.
- What is the average of the first eight triangular numbers?
- Determine the perpendicular drawn from a vertex to the opposite side in an equilateral triangle with side length 8√3 cm.
The base of a triangular plot is 25 meters, and its height is 30 meters. If a path of 2 meters wide is to be built around the plot, what will be the are...
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