M<1 = m<2 =
m<3=
m<4=

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m < 1 = 23°

m < 2 = 90°

m < 3 = 67°

m < 4 = 113°

Step-by-step explanation:

m < 2 is a right angle. Therefore, m < 2 = 90°.

Since m < 2 is 90°, then m < 1 + m < 67° = 90°

To solve for m < 1: subtract m < 67° from m < 2:

90° - m < 67° = 23°.  Thereforem m < 1 = 23° (acute angle).

m < 67° + m < 4 = 180° (supplementary angles).

To solve for m < 4: subtract m < 67° from 180°  

180° - m < 67° = 113° .

Therefore, m < 4 = 113° (obtuse angle).

The sum of m < 4 and m < 3 = 180° (supplementary angles).

180° - m < 4 = m < 3

180° - 113° = 67°

Therefore, m < 3 = 67° (acute angle).

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step-by-step explanation: