Answer:
see explanation
Step-by-step explanation:
(a)
The angle on the circumference is half the central angle , that is
∠ A = ∠ BOC ÷ 2 = 50° ÷ 2 = 25°
(b)
Δ AOC is isosceles ( OA = OC , radii of the same circle ) then the base angles are congruent , that is
∠ ACO = ∠ A = 25°
(c)
Δ BOC is isosceles ( OB = OC, radii of the same circle ) then the base angles are congruent, that is
∠ BCO =
=
= 65°
(d)
∠ ACO + ∠ BCO = 25° + 65° = 90° ( angle in a semicircle )
I don't know the formula of the
Answer:
The volume of c. figure is equal to 90 cm³
Step-by-step explanation:
These are the cuboids
The volume of a cuboid = l×b×h
A. 2×6×5
=> 60 cm³
B. 8×2×4
=> 64 cm³
C. 5×6×3
=> 90 cm³
D. 3×7×2
=> 42 cm ³
so, the volume of c. cuboid is equal to 90 cm ³
The equation we need to do is 1/11 times 7/22 so the answere would be
7/242