Geometryeasy · Past Paper
What is the perimeter of a semi-circle with radius 'r'?
Api * r
B2 * pi * r
Cpi * r + 2r
Dpi * r + r
✓ Correct Answer: C — pi * r + 2r
The perimeter includes the curved arc (pi * r) and the straight diameter (2r).
Share this question
More from Geometry
- What is the equation of a line with slope 0 and passing through (4, 5)?
- How many common tangents can be drawn to two non-intersecting circles that are far apart?
- If the length of a tangent from a point P to a circle is 24 cm and the distance of P from the center is 25 cm, find the radius.
- The area of a circle that can be inscribed in a square of side 6 cm is:
- The sum of any two sides of a triangle is always: