Title: Pythagorean Theorem and Space Figures
1Pythagorean Theorem and Space Figures
Lesson 9.8
2Rectangular Solid
- Face
-
- Edge AB is one of 12 edges
- Diagonal HB is one of 4 diagonals
ABFE is one rectangular face out of the 6 faces
H
G
E
F
O
C
A
B
3Regular Square Pyramid
- Square base Bottom of the pyramid.
- Vertex
-
- Altitude
- Slant height
Point where the edges of the triangles meet.
Distance from vertex to the base. It is
perpendicular to the center of the base.
Height of the triangles, perpendicular to the
base of the triangle.
4Look at the right angles inside and out.
5Look for the right angles here.
6Find HB
Keep your answer in reduced radical form.
?ABD, 32 72 (BD)2 v58 BD
?HDB, 52 (v58)2 (HB)2 25 58 (HB) 2
v83 HB
7- JK ¼ of JKMO ¼ (40) 10
- The slant height of the pyramid is the
perpendicular bisector of MK, so PSK is a right
?. - (SK)2 (PS)2 (PK)2
- 52 (PS)2 132
- PS 12
C. The altitude of a regular pyramid is
perpendicular to the base at its center. Thus,
RS ½ (JK) 5, and PRS is a right ?. (RS)2
(PR)2 (PS)2 52 (PR)2 122
PR v119