Knowee
Questions
Features
Study Tools

This design was formed by cutting 4 equal sectors from a circle that had an area 50 cm2.The remaining coloured sectors each have an angle at the centre of 80°. Work out the the total area of the coloured design, to the nearest square centimetre.Area of the design =  cm2 (to nearest sq cm)

Question

This design was formed by cutting 4 equal sectors from a circle that had an area 50 cm2.The remaining coloured sectors each have an angle at the centre of 80°. Work out the the total area of the coloured design, to the nearest square centimetre.Area of the design =  cm2 (to nearest sq cm)

🧐 Not the exact question you are looking for?Go ask a question

Solution

To solve this problem, we need to understand that the area of a circle is proportional to the angle that a sector makes at the center of the circle.

Step 1: Calculate the total angle of the colored sectors. Since each colored sector has an angle of 80° at the center, and there are 4 colored sectors, the total angle for the colored sectors is 80° * 4 = 320°.

Step 2: Calculate the proportion of the circle that the colored sectors represent. A full circle is 360°, so the colored sectors represent 320° / 360° = 0.888... of the circle.

Step 3: Calculate the area of the colored sectors. Since the colored sectors represent 0.888... of the circle, and the total area of the circle is 50 cm², the area of the colored sectors is 0.888... * 50 cm² = 44.44 cm².

Step 4: Round to the nearest square centimeter. The area of the colored sectors is approximately 44 cm² when rounded to the nearest square centimeter.

So, the total area of the colored design is 44 cm².

This problem has been solved

Similar Questions

The remaining coloured sectors each have an angle at the centre of 80°. Work out the the total area of the coloured design, to the nearest square centimetre.Area of the design =  cm2 (to nearest sq cm)

A semicircle of radius 3 units is drawn on one edge of a right-angled triangle, and a semicircle of radius 4 units is drawn on another edge. The semicircles intersect on the hypotenuse of the triangle, as shown.What is the shaded area, in square units?

Question 20 of 25To the nearest square centimeter, what is the area of the shaded sector in the circle shown below?A.201 cm2B.22 cm2C.346 cm2D.87 cm2

A sector has an area of 3m22 squared and subtends an angle of 80° at the centre of a circle.What is the radius of this circle?

n this diagram, a circle is drawn inside a square. Question promptWhat is the approximate area of the shaded part?(Use = 3pi equals 3 for approximation)Question response areaSelect one option85 m270 m255 m225 m210 m2

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.