Class-7 - Maths - Chapter-6 - The triangles and its property

The triangle formed by BC=5cm , AC=3cm , AB-5.8cm is

• a right angled triangle

• triangle

• an equilateral triangle

• an scalene triangle

In a $\Delta ABC$ , if $AB^2=BC^2+AC^2$ , then the right angle is at

• A

• B

• C

• none

The triangle formed by RC=7.2cm , AC=6cm and $\angle C=120\degree$ is

• an acute angle triangle

• an obtuse angled triangle

• an right angled triangle

• none

The triangle formed by AB=3cm , BC=4cm , AC=8cm is

• a scalene triangle

• an isosceles triangle

• an equilateral triangle

• no triangle is formed

If two angles in a triangle are $65\degree$ and $85\degree$ , then the third angle is

•  $30\degree$ 

•  $45\degree$ 

•  $60\degree$ 

•  $90\degree$ 

If one angle is the average of the other two angles and the difference between the greatest and least angles is 60°, then the formed triangle is

• an isosceles triangle

• an equilateral triangle

• a right angled triangle

• a right angled isosceles triangle

In $\Delta ABC$ , if AB=BC and $\angle B=80\degree$ then $\angle C=$  

•  $50\degree$ 

•  $100\degree$  

•  $130\degree$  

• none

The triangle formed by BC=AC=7.2cm and $\angle C=90\degree$ is

• A right angled triangle

• an isosceles triangle

• a right angled isosceles triangle

• no triangle is formed

Which of the following statement is false?

• The sum of the lengths of any two sides of a triangle is less than the third side.

• In a right angled triangle hypotenuse is the longest side

• A , B , C are collinear if AB + BC = AC

• None of these

The length of the hypotenuse of a right-angle triangle whose measure of two sides are 12 cm and 0.35 m is

• 37 cm

• 3.72 cm

• 0.372 cm

• 37 m