Construct tria gle with sides 4cm,5cm,7cmand then construct a triangle similar to it have length in ratio 2:3of first triangle
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1. construct a triangle of sides BC= 4cm AC = 5cm AB = 7cm
2. Draw any ray BX making an acute angle with BC on the side opposite to vertex A
3. Locate 3 points B1,B2,B3 on BX so that BB1=BB2=BB3
4. Join B3C and draw a line through B2 parallel TO B3C to intersect BC at C'
5. Draw a line through C parallel to AC to intersect AB at A'
6. Triangle A'BC' is a required triangle
2. Draw any ray BX making an acute angle with BC on the side opposite to vertex A
3. Locate 3 points B1,B2,B3 on BX so that BB1=BB2=BB3
4. Join B3C and draw a line through B2 parallel TO B3C to intersect BC at C'
5. Draw a line through C parallel to AC to intersect AB at A'
6. Triangle A'BC' is a required triangle
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