## Math Problem Statement

Beräkna omkrets och area

## Solution

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## Math Problem Analysis

### Mathematical Concepts

Geometry

Circles

Area

Perimeter

### Formulas

Perimeter of a semicircle: O = πr + 2r

Area of a semicircle: A = (1/2) × πr²

Perimeter of a quarter-circle: O = (πr/2) + 2r

Area of a quarter-circle: A = (1/4) × πr²

### Theorems

Circle Area Theorem

Circle Circumference Theorem

### Suitable Grade Level

Grades 7-9

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