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kap26 [50]
2 years ago
7

Help me please i dont understand

Mathematics
1 answer:
matrenka [14]2 years ago
5 0

Answer:

22

Step-by-step explanation:

The line where it says 2cm, extend that line to the top. You know have 2 triangles, call the one on the left A and the one on the right B

area of recntangle = bh

Rect A:

b = 5

h = 4 - 2

h = 2

bh = 5 x 2

bh = 10

Rect B:

b = 3

h = 4

bh = 4 X 3

bh = 12

Total = 10 + 12

Total = 22

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The lengths of two sides of a triangle are 4 cm 4 cm and 20 cm . 20 cm. Identify the correct pair of measures between which the
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Step-by-step explanation:

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Find the value of m angle 3-m<1
emmainna [20.7K]

Answer:

The value of m\angle 3-m\angle 1 = 50^{\circ}

Step-by-step explanation:

Vertical Angle theorem: It is about the angles that are opposite to each other.

Also, vertical angle are congruent that means vertical angles are equal.

In the given figure; m\angle 3 and 70^{\circ} are vertical angle

then, by vertical angle theorem,  m\angle3 =70^{\circ}.

Supplementary angle: the sum of the angles whose measure on the straight line is 180 degree.

From the figure, 70^{\circ} , \angle 1 and m\angle 2 =90^{\circ} forms a straight line.

then, by the definition of Supplementary angle;

70^{\circ}+m\angle 1 +m\angle 2=180^{\circ}

Substituting the value of  m\angle 2 =90^{\circ} in above equation:

70^{\circ}+m\angle 1 + 90^{\circ} =180^{\circ} or

160^{\circ}+m\angle 1=180^{\circ}

Simplify:

m\angle 1=180^{\circ}-160^{\circ} =20^{\circ}

therefore,  m\angle 1= 20^{\circ} and m\angle 3=70^{\circ},

the value of m\angle3-m\angle1= 70^{\circ}-20^{\circ} =50^{\circ}.






7 0
3 years ago
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