warm-up after 7.8: Geometry 7.9 Area of Circles & Sectors€¦ · Geom 03_07_17 sect 7_9 March 07,...
2
Geom 03_07_17 sect 7_9 March 07, 2017 warm-up after 7.8: 1. Find the radius. 2. Find the length of AB 3. Find m QR Geometry 7.9 Area of Circles & Sectors Learning Target : I can evaluate the area of circles & sectors. [G.C.5] A circle = π r 2 Area of a circle = π radius 2 Area of a circle ** Remember to follow order of operations (do exponents before you multiply) The diameter of a circle is 11cm. Find the area. 1. 2. The area of a circle is 158.3 yd 2 . What is the diameter ? Sector of a Circle - A region bounded by 2 radii of the circle and their intercepted arc. sector APB Area of sector = degrees in arc Area of circle 360˚ 3. Find the area of the sectors formed by ∠HJK. H ˚ m
Transcript of warm-up after 7.8: Geometry 7.9 Area of Circles & Sectors€¦ · Geom 03_07_17 sect 7_9 March 07,...
Geom 03_07_17 sect 7_9 March 07, 2017warm-up after 7.8:
1. Find the radius. 2. Find the length of AB
3. Find m QR
Geometry 7.9 Area of Circles & Sectors
Learning Target:I can evaluate the area of circles & sectors. [G.C.5]
Acircle = π r2
Area of a circle = π radius2
Area of a circle
** Remember to follow order of operations (do exponents before you multiply)
The diameter of a circle is 11cm. Find the area. 1.
2. The area of a circle is 158.3 yd2. What is the diameter?
Sector of a Circle- A region bounded by 2 radii of the circle and their intercepted arc.
sector APB
Area of sector = degrees in arc
Area of circle 360˚
3. Find the area of the sectors formed by ∠HJK.H
˚
m
Geom 03_07_17 sect 7_9 March 07, 2017
4. Find the area of C. 5. Find the area of the shaded region.
6 ft
18 ft
Assignment:7.9 worksheet
