Geometryhard · Past Paper
If a circle passes through the vertices of a triangle with sides 3, 4, and 5, what is the radius of the circle?
A2
B2.5
C5
D1.5
✓ Correct Answer: B — 2.5
The triangle is right-angled (3^2+4^2=5^2). The hypotenuse is the diameter. Radius = 5/2 = 2.5.
Share this question
More from Geometry
- The line segment joining a vertex of a triangle to the midpoint of the opposite side is the:
- If an exterior angle of a regular polygon is 24 degrees, how many diagonals does it have?
- The angles of a quadrilateral are in the ratio 2:4:5:7. Find the difference between the largest and smallest angle.
- An angle measuring 95 degrees is classified as:
- If the difference between two supplementary angles is 40 degrees, find the smaller angle.