Area= pi*r^2
So since the radius is half of the diameter, you need to divide 40/2=20
radius = 20
pi*20^2
20^2=400
pi= 3.1415...
pi*400=1256.63706...
So area will equal =1256.63706..., (since pi is never ending)
{ I might be wrong.]
Answer:
28
Step-by-step explanation:
Since the triangle is a right triangle, we can use SOH CAH TOA to find ?. 10 is OPPOSITE to ? and 21 is HYPOTENUSE to ?, so we can use SIN to find ?.
SIN(?) = 10/21
? = ARCSIN(10/21)
? = 28.437
Given that the cost of furniture after 20% reduction is $3,520. Thus the original price was:
120/100*3520
=$4224
Thus the original price was $4224
1.When all the three cut outs of the angles A, B, C placed adjacent to each other at a point, then it forms a line forming a straight angle, i.e. 180°.
Flence, it is proved that the sum of the three angles of a triangle is 180°.
Therefore, ∠A + ∠B + ∠C =180