Posted by **Connor** on Wednesday, January 18, 2012 at 6:20pm.

All of these are triangles

Find the areas of the triangles

1. 8 is base and 5 is height

A=bxh divided by 2

8x5=40 divided by 2=20

2. 6 is base and 7 is height

A=bxh divided by 2

7x6=42 divided by 2=21

3. 12 is base and 5 is height

A=bxh divided by 2

12x5=60 divided by 2=30

4. 11 is base and 6 is heigt

A=bxh divided by 2

11x6=66 divided by 2=33

5. 3 is base and 4 is height

A=bxh divided by 2

3x4=12 divided by 2=6

6. 15 is base and 9 is height

A=bxh divided by 2

15x9=135 divided by 2=67.5

MY ANSWERS

1. 20

2. 21

3. 30

4. 33

5. 6

6. 67.5

Is ALL of these correct?

- Triangles/Math -
**Damon**, Wednesday, January 18, 2012 at 6:22pm
Yes

- Triangles/Math -
**Damon**, Wednesday, January 18, 2012 at 6:24pm
You can do all but the last in your head easily. Simply divide whatever of the base or height is even by two, then multiply by the other.

like

5. 3 is base and 4 is height

3*2 = 6

- Triangles/Math -
**Connor**, Wednesday, January 18, 2012 at 6:38pm
All these are either rectangles or squares

1.Rectangle. 5 is length and 10 is width

10x5=50

2.Square. 5 is length and 5 is width

5x5=25

3.Rectangle. 6 is length and 8 is width

8x6=48

4.Square. 10 is length and 10 is width

10x10=100

5.Rectangle. 40 is length and 20 is width

40x20=800

MY ANSWERS

1. 50

2. 25

3. 48

4. 100

5. 800

- Triangles/Math -
**Connor**, Wednesday, January 18, 2012 at 6:39pm
The size of houses and buildings are measured in square feet. If you measured the outside length and width of a house and found the length was 60ft. and the width was 30ft., what is the size of the house in square feet?

60x30 and I got 1800ft

- Triangles/Math -
**Henry**, Friday, January 20, 2012 at 4:17pm
post it.

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