In a tessellation, what must the sum of the angles be where the vertices meet? 90° 180° 360° 60°

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer