Mathematics, 20.11.2019 17:31 lindsey0456
Given: δabc
prove: the sum of the interior angle measures of δabc is 180°.
statement
reason
1. let points a, b, and c form a
triangle.
given
2. let be a line passing
through b, parallel to ,
with angles as labeled.
defining a parallel line and labeling angles
3.
4. m∠1 = m∠4, and
m∠3 = m∠5.
congruent angles have equal measures.
5. m∠4 + m∠2 + m∠5 = 180°
angle addition and definition of a straight angle
6. m∠1 + m∠2 + m∠3 = 180°
substitution
what is the missing step in this proof?
a.
statement: ∠4 ≅ ∠5, and ∠1 ≅ ∠3.
reason: alternate interior angles theorem
b.
statement: is parallel to .
reason: is a transversal cutting and .
c.
statement: ∠1 ≅ ∠4, and ∠3 ≅ ∠5.
reason: alternate interior angles theorem
d.
statement: ∠1 ≅ ∠4, and ∠3 ≅ ∠5.
reason: ∠1 and ∠4, and ∠3 and ∠5 are pairs of supplementary angles.
Answers: 3
Mathematics, 21.06.2019 17:30, corinaartsy
Match each function with its rate of growth or decay
Answers: 1
Mathematics, 22.06.2019 02:00, joejoefofana
The trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? a) 48 cm2; 32 cm2; 80 cm 2 b) 48 cm2; 16 cm2; 64 cm 2 c) 128 cm2; 32 cm2; 160 cm 2 d) 128 cm2; 16 cm2; 144 cm 2
Answers: 1
Mathematics, 22.06.2019 02:30, destiny465
Why does the shape of the distribution of the weights of russet potatoes tend to be symmetrical?
Answers: 3
Mathematics, 22.06.2019 03:20, lovvyDovvy04
Indicate the equation of the given line in standard form. the line containing the longer diagonal of a quadrilateral whose vertices are a (2, 2), b(-2, -2), c(1, -1), and d(6, 4).
Answers: 2
Given: δabc
prove: the sum of the interior angle measures of δabc is 180°.
state...
prove: the sum of the interior angle measures of δabc is 180°.
state...
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Spanish, 18.10.2020 09:01
Chemistry, 18.10.2020 09:01
History, 18.10.2020 09:01