This math topic focuses on calculating the area of a circle using the radius. It introduces the fundamental geometric formula \( A = \pi r^2 \), where \( r \) is the radius of the circle. Students are presented with different problems where they apply this formula to find the area, using the value of the radius provided. Each question is supported with hints and a calculator option, reinforcing the practical application of the formula and enhancing computational accuracy in geometry.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Circle from Radius (with hint and calculator)
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
Find the area using the formula A = πr² where r is the radius
Area of a Circle from Radius (with hint and calculator) Worksheet
| Math worksheet on 'Area of a Circle from Radius (with hint and calculator) (Level 1)'. Part of a broader unit on 'Geometry - Circle Area - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_area_intro/ |
1
| Find the area using the formula A = πr² where r is the radius |
a
| 50 |
b
| 131.95 |
c
| 175.93 |
d
| 78.54 |
e
| 150.8 |
f
| 25 |
2
| Find the area using the formula A = πr² where r is the radius |
a
| 9 |
b
| 62.83 |
c
| 9.42 |
d
| 18.85 |
e
| 50.27 |
f
| 28.27 |
3
| Find the area using the formula A = πr² where r is the radius |
a
| 72 |
b
| 113.1 |
c
| 36 |
d
| 18.85 |
e
| 37.7 |
f
| 197.92 |
4
| Find the area using the formula A = πr² where r is the radius |
a
| 8 |
b
| 4 |
c
| 62.83 |
d
| 94.25 |
e
| 6.28 |
f
| 12.57 |
5
| Find the area using the formula A = πr² where r is the radius |
a
| 201.06 |
b
| 50.27 |
c
| 16 |
d
| 32 |
e
| 25.13 |
f
| 12.57 |
6
| Find the area using the formula A = πr² where r is the radius |
a
| 2 |
b
| 18.85 |
c
| 50.27 |
d
| 3.14 |
e
| 1 |
f
| 31.42 |