Question

1. Two triangles are said to be _____ if they have same shape but not necessarily the same size.
2. The distance of (0,a) from origin is _____.
3. The value of cos 90 degree is _____.
........ Fill the blanks. .......

Answer 1

Answer:

1.similar

2.??

3.0

Step-by-step explanation:

Answer 2

Answer:

1. 'similar'

2. 'a(a≥0)' or '-a(a<0)'

3. '0'

Explanation of 2.

The distance of $(0,a)$ to $(0,0)$ uses absolute value.

$\left \{ {{|a|=a(a\geq 0)} \atop {|a|=-a(a<0)}} \right.$

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