Question
What is the average of the first eight triangular numbers?
More Triangle Questions
- If the side of an equilateral triangle is 12cm, then find the area (in cm 2 ) of the triangle (correct to two decimal places).
- The inner-radius of a triangle is 5 cm, and the sum of lengths of its sides is 60 cm. What is the area of the triangle (in sq. cm.)?
- Two sides of a triangle are 10 cm and 15 cm. Which of the following can be the third side of the triangle?
- An equilateral triangle has all sides of length 14√3 cm. What is the altitude of this triangle?
- If two triangles EFG and UVW are congruent, then which of the following statement(s) is/are true? I. EF = UV II. ∠FEG = ∠UVW
- The corresponding medians of two similar triangles are 16 cm and 20 cm. If the area of the first triangle is 288 cm, then find the area of the second trian...
- Find the area of a triangle whose base is 18 cm and height is 14 cm.
- The sides of a triangle are 13 cm, 14 cm, and 15 cm. What is the area of the triangle?
- In triangle ABC, the difference between angle A and angle B is 16°, and the difference between angle A and angle C is 8°. Determine the measure of angle B.
- In triangle ABC, DE is parallel to BC, where D lies on AB and E lies on AC. If AD:AB = 3:5 and the area of triangle ABC is 200 sq cm, then the area of trap...
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