Area of Parallelograms and Triangles. Parallelograms in Real Life. PARALLELOGRAM. What is the area of this parallelogram?. S=side. H=height. B =base. CUT HERE!. PARALLELOGRAM. What is the area of this parallelogram?. H=height. B=base. MOVE TO HERE!. PARALLELOGRAM. - PowerPoint PPT Presentation
Citation preview
11.4 Area of a Parallelogram
Area of Parallelograms and TrianglesParallelograms in Real
Life
What is the area of this parallelogram?PARALLELOGRAMCUT
HERE!S=sideH=heightB=baseWhat is the area of this
parallelogram?PARALLELOGRAMMOVE TO HERE!B=baseH=heightIts the same
as the area of this
rectangle!PARALLELOGRAMH=heightB=baseAreaparallelogram = Base x
Height(perpendicular height H)
PARALLELOGRAMB=baseSideH=heightTo find the area of a
parallelogram, you always multiply the base and the height. So,
Area = base x height or A = bh
Remember: The height is the line segment that is perpendicular
to the base and creates a right angle.12 in10 in10 inWhat is the
area of this parallelogram?Area = base x heightA = (10)(10)A = 100
inYour TurnFind the area and perimeter of the parallelogram.
24 cm 12 cmA=bhA= 12(24)A=288 cm 14 cmP = 12+12+14+14P = 52
cmExampleFind the area and perimeter of the parallelogram.
16 cm 15 cmA=bhA= 15(16)A= 240 cm 21 cmP = 15+15+21+21P = 72
cmTriangles in Real Life
Area of a Triangle12Area of parallelogram = base x heightArea of
triangle = base x height
Area = bh
11Finding the Area of a TriangleWrite the formula for area of a
triangle.
Substitute in values.
Simplify.11 ft23 ftA= bh
A= (23)(11)
A= 126.5 ft
You Try!Find the Area of the triangle.
A = ?, b = 16.1 ft, h = 12 ft
A= bh
A= (16.1)(12)
A= 96.6 m
A= bh
A= (9)(6)
A= 27 ft
You try!Find the area and perimeter of the triangle.
