Answer:

Step-by-step explanation:
we know that
The measure of central angle ABC is
radians
so

subtends the complete circle
The area of the shaded sector is the area of a quarter circle
so
The area of a quarter circle is equal to

we have

substitute






Proved
Note that /* means 1 line added means fraction .
and ++ means +1
Answer:
Line PQ = Line XY
Line QR = Line YZ
Line RP = Line ZX
Angle P = Angle X
Angle Q = Angle Y
Angle R = Angle Z
Step-by-step explanation:
They're the same shape, just rotated and with different letters.
Area squares is the side*side, or



So, each side equals 5.
Answer:
12cm
Step-by-step explanation:
Width = 10 cm
Area = 120 cm²
Length = ?
Area = Length(L) × Width(W)
120cm² = L × 10cm
L = 120cm² ÷ 10 cm = 12cm