The answer for question four is B.80
Among angles i , k , g , a ,i and k are the exterior angles.
Given i°, k° ,g° ,a° are some angles and we have to find which angle is exterior angle.
The angle between a side of a polygon and an extended side is known as exterior angle of polygon. The sum of exterior angles of a polygon is equal to 180 degrees. We have to identify exterior angles among i° ,k° ,g° ,a°.
The angle i is an exterior angle because it is formed on a line opposite to angle d.
Angle k is also an exterior angle because it is also formed on opposite side of an angle.
Angle g is not an exterior angle.
Angle a is not an exterior angle.
Hence i and k are exterior angles among i, g, k, a.
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The scientific notation of 6.3 is written as 6.3 × 10^0; option A
<h3>Scientific notation</h3>
- The decimal points should be moved between the first digit and the next digit.
- When moving decimal point to the left in scientific notation; it is negative, that is, -
- When moving decimal point to the right in scientific notation; it is positive, that is, +
Therefore, since there are only two significant number in 6.3, the decimal point can not be moved.
6.3 in scientific notation
= 6.3 × 10^0
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12 • 16 = 192
5 • 3.14 = 15.7 15.7/2= 7.85
192 + 7.85 = 199.85
The area of the objective is 199.85
