one (1) The window of the city library is semicircle above, and a rectangle 1.6 meters high and 1.2 meters wide below. What's the area of this window? (the number is reserved for 2 decimal places) elder brother and elder sister, please (2) How many meters does it take to decorate the border of this window 2. Dad gave a round table bread at home with 3.768 meters long color bar (ignoring the joint). How many square meters is the area of this round table?

one (1) The window of the city library is semicircle above, and a rectangle 1.6 meters high and 1.2 meters wide below. What's the area of this window? (the number is reserved for 2 decimal places) elder brother and elder sister, please (2) How many meters does it take to decorate the border of this window 2. Dad gave a round table bread at home with 3.768 meters long color bar (ignoring the joint). How many square meters is the area of this round table?

1. (1) s = 1.6 * 1.2 + 3.14 * (1.2 / 2) & sup2 / 2 = 2.49m2
(2) L = (1.6 + 1.2) * 2-1.2 + (2 * 3.14 * 1.2 / 2) / 2 = 6.28m
That is 6.28 meters
2.R=3.768/(2*3.14)=0.6
S = 3.14 * 0.6 & sup2; = 1.1304 M2