Geometryhard · Past Paper
Two circles touch each other externally. The distance between their centers is 14 cm and the sum of their areas is 130*pi sq cm. Find the radii.
A7 cm, 7 cm
B10 cm, 4 cm
C11 cm, 3 cm
D9 cm, 5 cm
✓ Correct Answer: C — 11 cm, 3 cm
r1 + r2 = 14 and r1^2 + r2^2 = 130. Testing 11 and 3: 11+3=14, 121+9=130. Correct.
Share this question
More from Geometry
- The distance between (x, y) and the Y-axis is:
- In a triangle, if the square of one side is equal to the sum of the squares of the other two sides, then the angle opposite the first side is:
- If the three angles of a triangle are (x+10), (2x-20), and (x+30), find x.
- A point P is 25 cm from the center of a circle and the length of the tangent from P is 24 cm. The radius of the circle is:
- Find the area of an equilateral triangle with side 6 cm.