Triangles A Guided PowerPoint Presentation. 15cm 5cm 10cm 94º 1.
Triangles -Classroom presentation
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Transcript of Triangles -Classroom presentation
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Class VKavita Grover
1Kavita Grover
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Elements of a TriangleSidesSide ABSide BCSide CA
Angles ABC ACB BAC
Vertices A,B,C
A
B C
2Kavita Grover
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Types of Triangles
Based on sides
Based on angles
Equilateral
Isosceles
Scalene Acute
Right -angled
Obtuse
3Kavita Grover
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Review ExerciseTick the correct option.1) A triangle is formed by joining
a) 3 points b) 3 collinear pointsc) 3 linesd) 3 non collinear points
4Kavita Grover
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5Kavita Grover
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3) How will you denote a side AB of a triangle
a) Line ABb) ABc) ABd) Side AB
6Kavita Grover
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4) The given triangle is
a) Obtuse angle triangle
b) Scalene trianglec) Isosceles triangled) Acute angle
triangle
7Kavita Grover
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Answers
1) b
2) c
3) b
4) d
8Kavita Grover
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9Kavita Grover
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Angle sum property of a TriangleThe sum of the angles of a triangle is 180˚.
A
B C
A+ B+ C = 180˚
A
B
C
A+ B+ C= 180˚
10Kavita Grover
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Side property of a TriangleThe sum of the lengths
of any two sides is always greater than the length of the third side .
Side AB= 5cmSide BC= 5cmSide CA= 5 cmAB+BC >CA 5cm+5cm >5cm10 cm>5cm
BC+CA>AB5cm+5cm >5cm10cm>5cm
A
B C11Kavita Grover
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Side AB=4.5cmSide BC=7cmSide CA=5cmSide AB+BC>AC4.5cm+7cm>5cm11.5cm>5cm
A
B
C
12Kavita Grover