Question

Do as directed.
1. The measure of three angles of a quadrilateral is 30°, 70 and 100°. Find out the
measurement of fourth angle.
2. The measurement of one side of an equilateral quadrilateral is 10 cm. What is the
perimeter of the quadrilateral?
3. The perimeter of a square is 100 cm. What will be the measurement of each of its
side?
4. Parallelogram 'BEST' is given below. Find the measurement of angle x and angle y.
B
E
100
T
S​

Answer 1

Answer:

hope it helps

I didnt get the question no.4

Answer 2

Step-by-step explanation:

1) consider, m∠a=30°

m∠b=70°

m∠c=100°

to calculate m∠d = ?

as we know that sum of all angles of quadrilateral = 360°

thus, m∠a + m∠b + m∠c + m∠d = 360°

30° + 70° + 100° + m∠d = 360°

200° + m∠d = 360°

m∠d = 360° - 200°

m∠d = 160°

so, fourth angle of quadrilateral is 160°

2) given : one side of quadrilateral = 10cm

to calculate : perimeter of quadrilateral

perimeter of equilateral quadrilateral = 4 * one side of quadrilateral

= 4 * 10cm

= 40cm

3) given : perimeter of square = 100cm

to calculate side of a square

perimeter of square = 4 * a ( where a = side of a square)

100cm = 4 * a

a = 100 / 4

a = 25cm

thus measurement of each side of square = 25cm

4) where is angle x and angle y. found it to be incomplete question