What angle does an arc 5.5cm in length subtend at the centre of a circle of diameter 7cm

Below.

Step-by-step explanation:

7cm

(r) = 3.5cm

l = 5.5cm

Arc length = (Ѳ/360)2∏r

5.5 = (Ѳ/360)2*3.14*3.5

5.5 = (Ѳ/360)21.98

Divide  21.98.

5.5/21.98 = Ѳ/360

Ѳ/360 = 0.25

x 360.

Ѳ = 90

Arc angle is 90 degrees.

answer: ff

f

step-by-step explanation: f

ff

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116