1. Lesson #28 -
Surface Area of Prisms

2. A=pr2 A=bh 2 =p(6cm)2 =36p cm2 =(4m)(3m) 2 =113.1 cm2 =6 m2 5 m 4 m
1) Area of a Circle
Area of a Triangle
3 m
4 m
5 m
6 cm
A=pr2
A=bh 2
=p(6cm)2
=36p cm2
=(4m)(3m) 2
=113.1 cm2
=6 m2

3. A=(b1+b2)(h) A=apothem(P) 2 2 =(5mm)(6)(4mm) =(2cm+4cm)(3cm) 2 2
Area of a Polygon
Area of a Trapezoid
3 cm
4 cm
2 cm
4 mm
5 mm
A=apothem(P) 2
A=(b1+b2)(h) 2
=(5mm)(6)(4mm) 2
=(2cm+4cm)(3cm) 2
=60 mm2
=9 cm2

4. A=6s2 =6(3cm)2 A=54 cm2 2) TSA of a Cube 3 cm
Homework Take-Up- 5 minutes

5. 3) TSA of a prism
5 cm
21 cm
Homework Take-Up- 5 minutes

6. 4) TSA of a cylinder 5 cm 10 cm r=5 cm h=10 cm
A cube has 6 equal area si

7. Homework
Pg #3-5
Pg #6,8 & 12
Pg # 14ab,15