Can a triangle be formed with 7 cm, 7 cm and 7 cm as its sides?

Can a triangle be formed with the angles 80°, 30°, 40°?

Draw a line segment AB = 7 cm and mark a point P on it. Draw a line perpendicular to the given line segment at P.

Find the distance between the given lines using a set square at two different points on each of the pairs of lines and check whether they are parallel.

Draw a line segment measuring 7.8 cm. Mark a point B above it at a distance of 5 cm. Through B draw a line parallel to the given line segment.

Two angles of the triangles are given. Find the third angle.
(i) 80°, 60° 
(ii) 75°, 35°
(iii) 52°, 68°
(iv) 50°, 90°
(v) 120°, 30° 
(vi) 55°, 85°

Draw a line segment AB = 6.5 cm and mark a point M above it. Through M draw a line parallel to AB.

Draw a line and mark a point R at a distance of 4.8 cm above the line. Through R draw a line parallel to the given line.

Draw a line segment PQ = 12 cm. Mark two points M, N at a distance of 5 cm above the line segment PQ. Through M and N draw a line parallel to PQ.

Complete the following table :

Types of Triangle /Its Angles	Acute angled triangle	Right angled triangle	Obtuse angled triangle
Any two angles	Always acute angles	i.	Always acute angles
Third angle	ii.	Right angle	iii.