Math Question

(I just give you the 'sick'!)(!=pie,^=triangle !x=!Xx)
1(b) 5+2+2!5X0.5+2!2X0.5
1(c) 1X2+2!4X0.5+2!5X0.5
2 ((!3X3)X0.25)-3X3÷2
3(2X2-(!2X2X0.25))X2
5 2!(√42÷!)

last q.
(a)2+2+(2!2X(40/360))
I have to log out now!Do the left sum by yourself!

Question 1:
Half of circumference of large circle = ½ x pi x 2 x 10 cm = 10 x pi cm
Diameter of small circle = 5 cm + 2 cm = 7 cm
Half of circumference of small circle = ½ x pi x 7 cm = 3.5 x pi cm
Perimeter of the figure = 10pi +3.5 pi + 5 cm + 2cm
= (13.5 pi + 7) cm (in terms of pi) Answer
or 49.41 cm (2 decimal .place)

arc AED = half of circumference of large circle = ½ x pi x 10 cm = 5pi cm
arc AED = half of circumference of small circle = ½ x pi x (10cm – 2 cm) = 4pi cm
Perimeter of the figure = 5pi +4 pi + 1 cm + 1 cm = (9pi + 2) cm [Answer]
or 30.27 cm (2 decimal .place)

Last question:
(a) arc XY = 2 x 2 cm x pi x (40 deg/360 deg) = 4/9 pi cm
perimeter off the figure = 4/9 pi cm + 2 cm + 2 cm = (o.4444 pi + 4) cm [Answer]
or 5.349 cm (3 decimal .place)

(b) arc XY = 2 x 7 cm x pi x (160 deg/360 deg) = 6.2222 pi cm
perimeter off the figure = 6.2222 pi cm + 7 cm + 7 cm = (6.2222 pi + 14) cm [Answer]
or 33.548 cm (3 decimal .place)

Note: pi = 3.1416