similar shapes l.o. calculate unknown sides in similar triangles
TRANSCRIPT
Similar shapesL.O.Calculate unknown sides in similar triangles
Two shapes are said to be similar if one can be obtained from the other by uniformly scaling, possibly with additional translation, rotation or reflection.
Are these triangles similar?
3 cm
4 cm
5 cm
6 cm10 cm
8 cm
A B
If the shapes are similar what can you tell about the angles in the shapes?
IDENTIFY SIMILAR SHAPES
Are the shapes similar?
2 cm
2 cm
6 cm
If the shapes are similar what can you tell about the angles in the shapes?
6 cmBA
IDENTIFY SIMILAR SHAPES
Are the shapes similar?6 cm
10 cm
2 cm
4 cmB
A
If the shapes are similar what can you tell about the angles in the shapes?
IDENTIFY SIMILAR SHAPES
Are the shapes similar?
5 cm
10 cm2 cm
4 cm
BA
If the shapes are similar what can you tell about the angles in the shapes?
IDENTIFY SIMILAR SHAPES
Are these triangles similar?
3 cm
4 cm
5 cm
12 cm
15 cm9 cm
A
B
IDENTIFY SIMILAR SHAPES
If the shapes are similar what can you tell about the angles in the shapes?
Calculating unknown sides
3 cm
15 cm
7 cmX cm
Calculating unknown sides
X cm
Y cm
Calculating unknown sides
5 cm 8 cm
Y cm
9 cm X cm
34.2 cm
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Which pair are similar?
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STAR TimeGCSE A Grade
Question!
Plenary
Write a key word from today’s lesson on your whiteboard
Plenary
5 cm 8 cm
Y cm
15 cm X cm
36 cm
Find X and Y Show your method clearly