Answer:
(i) (b) RC
(ii) (d) 1/4 ar(ΔABC)
(iii) (b) 39 cm
(iv) (a) 90°
Step-by-step explanation:
(i) (b) RC
(ii) (d) 1/4 ar(ΔABC)
(iii) (b) 39 cm
(iv) (a) 90°
Answer:
Step-by-step explanation:
we know that
The surface area of the regular pyramid is equal to the area of the triangular base plus the area of its three triangular lateral faces
step 1
Find the area of the triangular base
we know that
The triangular base is an equilateral triangle
so
The area applying the law of sines is equal to
step 2
Find the area of its three triangular lateral faces
we have
Find the height of triangles
Applying the Pythagorean Theorem
solve for h
substitute
step 3
Find the surface area
Adds the areas
Round to the nearest tenth
I believe it’s A because if it is perpendicular you would have to flip 6X and change the sign so therefore it would be A. In slope intercept form it would be y=-6x+1.
Answer:
it's 4488 Wich would make 187