To find the area of a triangle you have to follow the formula 1/2 BH (One half time the base times the height) So 4 x 3 would equal 12. Then divide it by 2 to get 6.
The formula for area of a triangle is 1/2bh with b being the base and h being the height. The base and height here are 4 and 3 so multiply them to get 12 and then multiply that by 1/2 to get 6cm^2
This is a question of randomness so there really is no answer. I would guess 7 since that is the center page and you're more likely to open it up in or near the middle
