Objective: Know the sum of angles at a point, on a straight line and in a triangle. Vocabulary:
Mar 27, 2015
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Objective:
Know the sum of angles at a point, on a straight line and in a triangle.
Vocabulary:
900
900
90 0
900
900
400
?0500
300
550
720
630
530
300
550
720
630
510
600
350
180
270
390
1800
1800
1800
1800
1800
500
?01300
550
600
1150
3501120
550
600
1150
3501120
12501200
650
680
1450
3600
550
3050
550
2150
900 + 550 = 1450
3600 – 1450 = 2150
850
2750
1150
2450
850
850
500
750
1900 1450
rulerruler
rulerruler
ruler
rulerrulerruler
rulerrulerruler
ruler
ruler
ruler
ruler
ruler
ruler
The sum of the angles in a triangle is 1800
The sum of the angles in a triangle is 1800
The sum of the angles in a triangle is 1800
850
500
?
850 + 500 = 1350
1800 – 1350 = 450
? = 450
The sum of the angles in a triangle is 1800
1100
300
?
300 + 1100 = 1400
1800 – 1400 = 400
? = 400
The sum of the angles in a triangle is 1800
520
550?
550 + 520 = 1070
1800 – 1070 = 730
? = 730
The sum of the angles in a triangle is 1800
600 750
?
750 + 600 = 1350
1800 – 1350 = 450
? = 450
Thank you for your attention
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