Triangle area by sides, applications to quadrilateralsPractice Questions & MCQs
Practice Triangle area by sides, applications to quadrilaterals questions from Heron's Formula (Class 9 Maths) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Triangle area by sides, applications to quadrilateralsQuiz - Solve & Score
Q1. A florist builds a triangular wreath base with sides 27 cm, 30 cm and 51 cm. What is the base area in square centimetres?
- A.108
- B.648
- C.405
- D.324
Answer: D. 324
Semi-perimeter s = (27+30+51)/2 = 54. Area = sqrt(s(s-a)(s-b)(s-c)) = sqrt(54*27*24*3) = 324.
Q2. A sail on a small boat is triangular with edges measuring 20 m, 37 m and 51 m. What is the area of the sail in square metres?
- A.370
- B.612
- C.108
- D.306
Answer: D. 306
Semi-perimeter s = (20+37+51)/2 = 54. Area = sqrt(s(s-a)(s-b)(s-c)) = sqrt(54*34*17*3) = 306.
Q3. A geologist samples a triangular rock outcrop whose edges measure 3 m, 4 m and 5 m. What is the area of the outcrop in square metres?
- A.12
- B.-3
- C.18
- D.6
Answer: D. 6
Semi-perimeter s = (3+4+5)/2 = 6. Area = sqrt(s(s-a)(s-b)(s-c)) = sqrt(6*3*2*1) = 6.
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Where can I practise Triangle area by sides, applications to quadrilaterals questions for Class 9 Maths?
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Yes. These Triangle area by sides, applications to quadrilaterals important questions follow the Maths exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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