Which step should be taken next to construct a line through point P perpendicular to BA?
2 answers:
Answer:
Refer picture enclosed
Step-by-step explanation:
Given is a line BA and a point P. We have to construct a line perpendicular to BA through P.
Case I: P lies on the line BA
Without loss of generality assume BP is smaller than AP.
Cut an arc C on AB from P such that BP=CP
Now with B and C as centres draw arc up and down the line with more than half length of BC
Join the intersecting of arcs. That line is the perpendicular for BA through P.
This is because of concurrency of two triangles above the line BC
Case2:
P lies outside the line. Measure PB and cut an arc of BA with length PB
Let the point be C
Then CP=BP
NOw do as we did before the line with arcs more than 1/2 length of BC from B and C only down. Join the point of intersection down with P. This line will be perpendicular through P to BA
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Answer:
Step-by-step explanation:
The area of a regular octahedron is given by:
area = . Let a is the length of the edge (diagonal).
area =
Given that the diagonal of the octahedron is equal to height (h) of the tetrahedron i.e.
a = h, where h is the height of the tetrahedron and a is the diagonal of the octahedron. Let the edge of the tetrrahedron be e. To find the edge of the tetrahedron, we use:
The area of a tetrahedron is given by:
area = =
The ratio of area of regular octahedron to area tetrahedron regular is given as:
Ratio =