6cm
5cm
4cm
3cm
Correct answer is C
Base of pyramid of a square of side 8cm vertex directly above the centre edge = 4√3cm
From the diagram, the diagonal of one base is AC2 = 82 + 82
Ac2 = 64 + 64 = 128
AC = 8√2
but OC = 12AC = 8√22 = 4√2cm
OE = h = height
h2 = (4√3)2
16 x 2 - 16 x 2
48 - 32 = 16
h = √16
= 4
In the diagram, KS is a tangent to the circle centre O at R and ∠ROQ = 80°. Find ∠QRS. ...
Find the area and perimeter of a square whose length of diagonals is 20√2 cm...
If 43x = 16x+1, find the value of x ...
In a class of 150 students, the sector in a pie chart representing the students offering physic...
What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2? ...