Summative exercise C1 Q1 Q2 | Circular Measure Chapter 1| Latihan sumatif bab 1 Sukatan membulat

Summative exercise C1 Q1 Q2 | Circular Measure Chapter 1| Latihan sumatif bab 1 Sukatan membulat | kssm matematik tambahan tingkatan 5 textbook | Add Maths Form 5 Chapter 1

The diagram on the right shows sector KOL from a circle with centre O and a radius of 10 cm. Given that the area of the sector is 60 cm2, calculate PL 2
(a) the value of q, in radians,
(b) the perimeter of sector KOL, in cm.

2. The diagram on the right shows sector AOB from a circle with centre O. Given that AD = DO = OC = CB = 3 cm, find PL 2
(a) the perimeter of the shaded region, in cm,
(b) the area of the shaded region, in cm2.

[TeacherMirah]

Sorry made a mistake for 2a)

CD² = 3² + 3² - 2 x 3 x 3 cos (114°35°)
= 25.488.

CD = √25.488 = 5.049

Miss one step there in the formula 👀

[TeacherMirah]

You can also use trigo to find length of DC. 😎

[ain]

No. 2 a) i cannot get the answer for cd