Question

25. Determine the length of side CB.

26.Conical containers are often used for selling popcorn or snow cones. To construct a cone, a sector is cut from a circle, then the cut edges are joined. Find the area of the sector that would be needed to make this cone.

24.0cm 18.0cm 113.1cm

Answer 1

-> 25. Let ICBI and IABI denote the length of co and AB respectively => |ABI = 1 CB1 tant1099 and IABI=(1571CB1) tan(409) MICBI danttoº)=(15 + ICBI) fan ( 10°) -) |СВІ ( tan(70) – fan(40")) = 15tan (409) - ICB -- 15 fan (40°) Op 15 X 0.84 fan( 70*) - fan (46) 6.597 -) ICBI = 62597 2.75-0.84

=> The length of CB is 6.597 cm. 26. S 24 oli Then s=518² +24² cm = √324 +576 cm = 5900 cm = 30 cm s=30cm. => The raclius of the sector is =.2018 radians 2 x 180 x 18 30 = 216 degree. 30 degree - The sector makes an angle of 216° at the center => The area of the sector is 216° 7 (30)2 360 sm² = 0.6 X 2,827.43 = 1696.46 cm² cm2 => The area of the sector that would be needed to make the given cone 1696.46 cm² is