Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
Day 1: DIRT ­ Do I Remember This? For #1 and #2, fill in the boxes with the correct "inside" numbers for the 45­45­90 and 30­60­90 triangles below:
2.
1. 30o
60o
For #3 and #4, solve for the missing information in the following triangles. If necessary, leave your answers in simplest radical form. 16
x
12
14
x
z
wo
o
y
x=____________
x=_____, y=_____, z=_____, w=______
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Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
Day 1: Section 7.1 ­ Areas of Parallelograms and Triangles
Objective: To find the areas of parallelograms and triangles
M.2.C.
Performance Standard:1.6, 3.4, 3.8 DOK­ 2
Gentle Reminders: It is critical
to know where the
base and true height are located in each picture.
It is also critical to know how to use pythag and
special right triangle theorems to help find missing
values.
Parallelogram
Triangles
entire base
true height
true height
entire base
entire base
true height
entire base
Key Question? How do the true height and the base meet? At a right angle
2
Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
Parallelograms: Area = bh
Find the area of the following parallelograms. When necessary, leave the answers in simplest radical form. 1)
5m
10m
12 ft
2)
13 ft
3)
4 in
12 in
3
Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
6 cm
4)
4.
2 cm 10cm
5cm
5)
3.5 cm
3cm
4
Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
12 m
6 m
6)
60
7)
2
5 45
10
5
Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
A parallelogram has 9­in. and 18­in. sides. The height corresponding to the 9­in. base is 15 in. Find the height corresponding to the 18­in. base.
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Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
Assignment: p. 351­354 #1­3, 8­10, 14a, 15, 54
1. Draw the parallelogram and find the area. 2. Draw the parallelogram and find the area. Area: _________________________________
Area: _________________________________
3. Draw the parallelogram and find the area. 8. Draw the parallelogram and find the area. Area: _________________________________
Area: _________________________________
9. Draw the parallelogram and find the area. 10. Draw the parallelogram and find the area. Area: _________________________________
Area: _________________________________
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Day 1 ­ 7.1 Areas of Parallelograms.notebook
February 24, 2014
14a. Draw the picture and show ALL work.
Area of the paved region: ____________________________________________
15. entire base of ABJF: ________________
54. Draw picture and show work: true height of ABJF: _______________
area of ABJF: ___________________
answer: ________________
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