f)
B
A
A parallelogram is made by putting 4 congruent triangular pieces cut from a grey
paper together, as shown in Fig. 10. If the altitude of AADF is 10 cm and
side CD = 16 cm, find the area of AGCB.
Answers
Answer:
∠BAC = 60°
∠BOC = 120°
The angle made by any arc of a circle on the alternate arc is half the angle made at the centre.
Kerala Syllabus 10th Standard Maths Solutions Chapter 5 Trigonometry - 19
The sides of the right angle triangle ΔCOD with angles 30°, 60°, 90° are proportional to the number 1 : √3: 2 .
Kerala Syllabus 10th Standard Maths Solutions Chapter 5 Trigonometry - 20
Explanation:
∠BAC = 60°
∠BOC = 120°
The angle made by any arc of a circle on the alternate arc is half the angle made at the centre.
Kerala Syllabus 10th Standard Maths Solutions Chapter 5 Trigonometry - 19
The sides of the right angle triangle ΔCOD with angles 30°, 60°, 90° are proportional to the number 1 : √3: 2 .
Kerala Syllabus 10th Standard Maths Solutions Chapter 5 Trigonometry - 20