1 2 3 4 Get Microsoft Mouse Mischief READ THIS SLIDE FIRST (This is a hidden slide and will not appear in the slide show) This presentation requires Microsoft Mouse Mischief. Mouse Mischief lets students use computer mice to answer questions and participate in activities teachers create in PowerPoint presentations. To learn more, visit www.microsoft.com/mousemischief Get Microsoft Mouse Mischief 1 Download and Install Download and install the Mouse Mischief add-in. Copy and paste www.microsoft.com/mousemischief into your browser window to visit the site. 2 Restart PowerPoint After installation is complete, restart PowerPoint. 3 Create Use the Mouse Mischief features on the Multiple-Mouse tab. 4 Play Slide Show To play a multiple-mouse slide show (such as this file), click the Play Slide Show button. The Microsoft® Mouse Mischief™ add-in works with Microsoft® PowerPoint® 2010 or Microsoft® Office PowerPoint® 2007.
Calculating the Area of a Triangle How Big Is My Triangle? Calculating the Area of a Triangle
A triangle is one-half of a parallelogram. The second triangle has been turned upside down. When the second triangle is placed adjacent to the first one, the two triangles form a parallelogram. 1st triangle 2nd triangle
You know how to find the area of a parallelogram. Height (h) = 4 in Base × Height (b × h) = Area 6 × 4 = 24 square inches Base (b) = 6 in
If a triangle is half of a parallelogram, how do you think you find the area of a triangle? Multiply base by height (b × h) Multiply base by height and divide by 2 (b × h) ÷ 2 Multiply base by height and multiply by 2 b × h × 2
So, how do you find the base and height of a triangle? A right triangle is easy This isosceles triangle isn’t too hard This scalene triangle can be a little more challenging height base height base height base
What is the area of the triangle below? Use the formula (b × h) ÷ 2 15 square inches 3 in 5 in 10 square inches 7½ square inches
Is the area of this triangle 8 square inches?
Draw lines to show where you could measure the base and height of this triangle.
If this triangle has the specified base and height, what is its area? 21 square inches 42 square inches 6 in 13½ square inches 7 in
Draw lines to show where you could measure the base and height of this triangle.
If this triangle has the specified base and height, what is its area? 9 in 2 in 4½ square inches 18 square inches 9 square inches