WebThe circumference can be found by the formula C = πd when we know the diameter and C = 2πr when we know the radius, as we do here. Plugging our radius of 3 into the formula, we get C = 6π meters or approximately 18.8495559 m. Now we multiply that by (or its decimal equivalent 0.2) to find our arc length, which is 3.769911 meters. WebR = radius of circle (known) x = length of equilateral triangle Draw the figure (outside equilateral triangle with inscribed circle). Put a dot in the center of the circle. Draw a line from the center of the circle to a point where the circle barely touches the triangle. This forms a right angle with that line, and that length = R (radius).
Ex 12.2, 5 - In a circle of radius 21 cm, an arc subtends 60 - teachoo
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 WebNov 3, 2024 · In a circle with a radius of 5 cm and arc of 1 radian measures 5 cm. That is the definition of a radian! In that circle and arc of 3 radians would be 15 cm. harvard business school cover letter guide
In a circle of radius 14 cm, an arc subtends an angle 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 WebOct 9, 2024 · Find the perimeter of the quadrant of a circle of radius 14 cm. WebIn a circle of radius 14 cm, an arc subtends an angle of 120∘ at the centre. If √3 = 1.73 then the area of the segment of the circle is (a) 120.56cm2 (b) 124.63cm2 (c) 118.24cm2 (d) … harvard business school course curriculum