WebOA=OB=OC=6cm Let OD be perpendicular from O on side BC . Then , D is the mid - point of BC. OB and OC are bisectors of ∠B and ∠C respectively. Therefore, ∠OBD=30 o In triangle OBD, right angled at D, we have ∠OBD=30 o and OB=6cm. Therefore, cos(OBD)= OBBD cos(30 o)= 6BD BD=6cos30 0 BD=6× 2 3=33cm BC=2BD=2(33)=63cm WebDec 22, 2024 · Choose the useful one based on the data you have. This calculator will automatically estimate all of the other values. The first one bases on the radius of the circle. The diameter equals the length of two radiuses. d=2r d = 2r. Area of a circle: d=2\sqrt {\frac {a} {π}} d = 2 πa. Circumference of a circle:

Ex 12.2, 5 - In a circle of radius 21 cm, an arc subtends 60 - teachoo

WebAug 9, 2024 · Explanation: calculate the area (A) of a circle using the formula ∙ xA = πr2 ← r is the radius here r = 14 A = π× 142 = 196π ≈ 615.75 cm2 Answer link Kalyanam S. Aug 9, … WebDec 19, 2024 · We know that the area A of a sector of angle θ in a circle of radius r is given by Here, r = 14 cm and θ = 45 = 77 cm 2 Example 3: In Fig. there are shown sectors of two concentric circles of radii 7 cm and 3.5 … raybrooks lunch schedule

Central Angle Calculator - Calculator Hub

WebFeb 3, 2024 · To calculate the radius of a circle by using the circumference, take the circumference of the circle and divide it by 2 times π. For a circle with a circumference of … WebAug 9, 2024 · Explanation: calculate the area (A) of a circle using the formula ∙ xA = πr2 ← r is the radius here r = 14 A = π× 142 = 196π ≈ 615.75 cm2 Answer link Kalyanam S. Aug 9, 2024 Area of circle A = 616 cm2 Explanation: Area of a circle is given by the formula A = πr2 where r is the radius of the circle. Given r = 14cm Web• In the formula for arc length the circumference C = 2πr • L / θ = 2πr / 2π • After division there will be only: L / θ = r • To calculate arc length formula, you have to multiply this equation by θ: L = r * θ In radians: • To find arch length with radius the formula will be: s … simple recycled materials