The inclined one is drawn at an angle of 60 degrees to the plane and is equal to 13 cm.

The inclined one is drawn at an angle of 60 degrees to the plane and is equal to 13 cm. Find the inclined projection onto the plane.

The oblique projection denotes the leg, which lies on the plane to which the oblique is directed.

Since the angle between oblique and oblique projection is 60 degrees, the other angle is:

90 – 60 = 30 °.

Since the sum of the acute angles of a right-angled triangle is 90 degrees.

The leg (projection oblique), lying opposite an angle of 30 ° is equal to half of the hypotenuse.

Let’s make the proportion:
1/2 = x / 13 cm ->

x = (1 * 13) / 2 = 13/2 = 6.5 cm – oblique projection length.

Answer: 6.5 cm.