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The diagram shows a triangle ABC. 5 cm 6 cm B The lengths of AC and BC are 5 cm and 6 cm respectively. The area of triangle ABC is 12.5 cm², and angle ACB is obtuse. (a) Find the size of angle ACB, giving your answer to the nearest 0.1°. (b) Find the length of AB, giving your answer to two significant figures.

The diagram shows a triangle ABC. 5 cm 6 cm B The lengths of AC and BC are 5 cm and 6 cm respectively. The area of triangle ABC is 12.5 cm², and angle ACB is obtuse. (a) Find the size of angle ACB, giving your answer to the nearest 0.1°. (b) Find the length of AB, giving your answer to two significant figures.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Q4. The diagram shows a triangle ABC. 5 cm 6 cm B The lengths of AC and BC are 5 cm and 6 cm respectively. The area of triangle ABC is 12.5 cm?, and angle ACB is obtuse. (a) Find the size of angle ACB, giving your answer to the nearest 0.1°. (b) Find the length of AB, giving your answer to two significant figures.
Transcribed Image Text:Q4. The diagram shows a triangle ABC. 5 cm 6 cm B The lengths of AC and BC are 5 cm and 6 cm respectively. The area of triangle ABC is 12.5 cm?, and angle ACB is obtuse. (a) Find the size of angle ACB, giving your answer to the nearest 0.1°. (b) Find the length of AB, giving your answer to two significant figures.
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