# NCERT Class 11-Math's: Chapter –12 Introduction to Three Dimensional Geometry Part 11

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**Question 32:**

If a parallelopiped is formed by planes drawn through the points and parallel to the coordinate planes, then the length of diagonal of the parallelopiped is

(A)

(B)

(C)

(D)

**Answer: (A)**

**Question 33:**

L is the foot of the perpendicular drawn from a point on the plane. The coordinates of point L are

(A)

(B)

(C)

(D) None of these

**Answer: (D)**

**Question 34:**

L is the foot of the perpendicular drawn from a point on *x-*axis. The coordinates of L are

(A)

(B)

(C)

(D) None of these

**Answer: (A)**

## Fill in the Blanks in Exercises from 35 to 49

**Question 35:**

The three axes OX, OY, OZ determine ________ .

**Answer:**

Three coordinates planes

**Question 36:**

The three planes determine a rectangular parallelopiped which has ________ of rectangular faces.

**Answer:**

Three pairs

**Question 37:**

The coordinates of a point are the perpendicular distance from the ________ on the respectives axes.

**Answer:**

Given Point

**Question 38:**

The three coordinate planes divide the space into ________ parts.

**Answer:**

Eight

**Question 39:**

If a point P lies in plane, then the coordinates of a point on plane is of the form ________.

**Answer:**

**Question 40:**

The equation of plane is ________.

**Answer:**

**Question 41:**

If the point P lies on *z*-axis, then coordinates of are of the form ________.

**Answer:**

**Question 42:**

The equation of axis, are ________.

**Answer:**