Question

Case Study based
A circular park of radius 10 m is situated in a colony. Due to maintenance work done in the park, a
triangular barricade is set upon points A, B & C around the work area so that visitors do not step on
the area. Points A B & C are equidistant from each other and sit on the circumference of the park.

1)The angle made by point A with the two other points B & C
a) 30⁰
b) 45⁰
c) 60⁰
d) 90⁰
2)The angle made by point A and point B with the centre of the park?
a) 90⁰
b) 120⁰
c) 180⁰
d) 360⁰
3) The formula to find the area of the circle is
a) 2 r
b) d
c) 2 r²
d) r²
4) If a boy runs around the park, how much distance will he cover in one round?
a) 20 cm
b) 100 cm
c) 20 cm²
d) 200 cm²
5)If the authorities add one more point to the barricade, such that the 4 points A, B, C & D align on
the circumference of the circle. ‘O’ is the centre of the park and ∠ADC = 120°. What is the value of
ABC?
a) 120⁰
b) 60⁰
c) 180⁰
d) 240⁰

Answer 1

Step-by-step explanation:

1) b

2)c

3)c

4)b

5c

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