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C. Perpendicular Planes26.Show that through a given point A, there can be drawn infinitely many planes perpendicular to a given plane α.
AB = 6 cm and BD = DC = 5 cm are given. Find AD, if (ABC) ⊥ (BDC). 28.Two planes are perpendicular to each other. Can we draw a line, a) Perpendicular to both of the planes b) Parallel to both of the planes c) Perpendicular to one of the planes and parallel to other plane.
If AB = 4 cm find AK.
30.In the figure ABCD and CRST are two congruent squares. Given that AB is perpendicular to BT, BT is perpendicular to TS and BT = TS = 6 cm. Find AS.
32.State the following as true or false. a. Three planes may be perpendicular to each other. b. Three lines may be perpendicular to each other. c. A line may be parallel to both of two intersecting planes. d. A line may be perpendicular to both of two intersecting planes. 33.State the following as true or false for a space. a. There are infinitely many planes perpendicular to a line. b. There are infinitely many lines perpendicular to a line. c. From a point we can draw only one perpendicular plane to a line. d. From a point we can draw only one perpendicular line to a line. e. We can draw infinitely many perpendicular lines to a line.
Given that DABC is an equilateral triangle, m(<KBC) = 90°, KC = 20 cm and AC = 16 cm. Find AK.
TC AD = 8 cm, AB = 6 cm. Find AT.
36.In the figure, ABCD and ADEF are rectangles. Given that, ED
EF = 8 cm. The semicircle that we draw inside of ABCD is tangent to BC at T. Find FT.
BC AD = DK = 5 cm. Find AL.
D. Distance
a) If AB = AC then PB = PC. b) If PB < PC then AB < AC.
39.In the figure AC is perpendicular to plane P. Given that, m( BE = ED = 5 cm, AB = AD and DC = 13 cm. Find A(DABD).
Find PA + PC.
41.An ant is walking 5 m to east then 2 m to south. Then it is climbing on a plane with a 60 inclination for 4 m to the west. What is the distance between the starting point and the end point of the ant.
42.A helicopter is rising for 600 m then going to east for 800 m then to north for 2400 m. What is the distance between the starting and ending point of the helicopter?
44.In a plane there are two parallel lines d and k. A and B are two points on line d and AB = 6 cm. If the distance between these two lines is 5 cm find the area of the triangle ABC where C is a point on line k.
Date: 2015-12-11; view: 1955
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