Answer:
(a) AD=6 cm
(b) 66 cm²
(c) 38 cm
Step-by-step explanation:
(a) To get the length of AD, we can use pythagoras on the triangle part. Let's say the dotted line intersects DC at E. Then since AB and DC are parallel, AD is equal to BE. EC = 8 cm simply by subtracting AB from DC (15-7=8).
Then pythagoras says that 8²+BC²=10². So BC = √(100-64) = 6. And since BC=AD, AD is also 6.
(b) Area of the rectangle DEBA is 7*6 = 42. Area of triangle ECB is base times half height: 8*3 = 24. Sum is 42+24 = 66 cm²
(c) Perimeter is 7+10+15+6 = 38 cm. Add all the side lengths.
3:5
5+3= 8
72 / 8 = 9
9 x 3 = 27
27 spots for cats
Answer:
no
Step-by-step explanation:
15 x 12 = 180
Sheila's entertainment center has enough space for a tv with an area of 180 sqaure inches.
196 > 180
so the television will not fit
Answer:
Day 1- 24
Day 2- 48
Day 3- 96
Day 4- 192
Day 5- 384
Step-by-step explanation:
384, or C.
Answer:
9 % of 450 = 9/100 x 450
= 40.5
Step-by-step explanation: