Mathematics
Match the following:
| Measures of triangles | Types of triangles |
|---|---|
| (i) 3 sides of equal length | (a) Scalene |
| (ii) 2 sides of equal length | (b) Isosceles right-angled |
| (iii) all sides of different length | (c) Obtuse-angled |
| (iv) 3 acute angles | (d) Right-angled |
| (v) 1 right angle | (e) Equilateral |
| (vi) 1 obtuse angle | (f) Acute-angled |
| (vii) 1 right angle with two sides of equal length | (g) Isosceles |
Triangles
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Answer
| Measures of triangles | Types of triangles |
|---|---|
| (i) 3 sides of equal length | (e) Equilateral |
| (ii) 2 sides of equal length | (g) Isosceles |
| (iii) All sides of different length | (a) Scalene |
| (iv) 3 acute angles | (f) Acute-angled |
| (v) 1 right angle | (d) Right-angled |
| (vi) 1 obtuse angle | (c) Obtuse-angled |
| (vii) 1 right angle with two sides of equal length | (b) Isosceles right-angled |
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Name the following triangles with regards to angles:
Name each of the following triangles in two different ways (you may judge the nature of the angle by observation):
State which of the following statements are true and which are false:
(i) A triangle can have two right angles.
(ii) A triangle cannot have more than one obtuse angle.
(iii) A triangle has at least two acute angles.
(iv) If all the three sides of a triangle are equal, it is called a scalene triangle.
(v) A triangle has four sides.
(vi) An isosceles triangle is an equilateral triangle also.
(vii) An equilateral triangle is an isosceles triangle also.
(viii) A scalene triangle has all its angles equal.
State whether the following statements are true (T) or false (F):
(i) Each angle of a rectangle is a right angle.
(ii) The opposite sides of a rectangle are equal in length.
(iii) The diagonals of a square are perpendicular to one another.
(iv) All sides of a rhombus are equal in length.
(v) All sides of a parallelogram are equal in length.
(vi) The opposite sides of a trapezium are parallel.
(vii) The diagonals of a parallelogram are equal.