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BartSMP [9]
3 years ago
13

115 + ( -215 ) + 315 + ( -415) + 515 + ... + 3915 + ( -4015 ) =

Mathematics
2 answers:
Likurg_2 [28]3 years ago
5 0
215 because you would add and subtract the numbers as you go them you come out with your answer
quester [9]3 years ago
4 0
215 expression calculator by mapa
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<h3>             Acute Angles: ∠TLS, ∠SLT, ∠ULR</h3><h3>             Right Angles:   ---------</h3><h3>             Obtuse Angles:  ∠RLT, ∠SLU, ∠ULS,</h3><h3>             Straight Angles:  ∠RLS, ∠TLU </h3><h3>             Not angles: ∠TRL </h3>

Step-by-step explanation:

The lines intersect at point L, so all angles have a vertex (middle letter) L so there is no angle TRL

Straight angle is a line with dot-vertex, so the straight angles are ∠RLS and ∠TLU.

∠TLS is less than 90° then it is acute angle (∠SLT is the same angle). ∠ULR is vertex angle to ∠TLS, so it's also acute angle.

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