Question

The angle subtended by a sector of a circle is 45 degree and its radius is 28cm find the perimeter of sector 78cm,22cm,364

Answer 1

✪AnSwEr

${\tt{\red{\underline{\large{Given}}}}}$

• Angle subtended by a sector is 45°
• Radius = 28

${\sf{\green{\underline{\large{To\:find}}}}}$

• Perimeter of sector

${\sf{\pink{\underline{\Large{Explanation}}}}}$

☞Perimeter of sector= ∅/360° 2πR

Calculation

=45°/360° × 2 ×22/7 × 28

=22cm

Additional Information

• Area of circle = πr²
• Area of sector= ∅/360° πR²
• Area of segment=∅/360° πR²- 1/2 r² sin∅
• Value of π=3.146363

Answer 2

Answer:

$\frac{ theta }{360} (2\pi \: r)$

$\frac{45}{360} \times 2 \times \frac{22}{7} \times 28 \\ \\ = > 22cm$